Terrorists! It must have been terrorists! 
Or the owner trying to collect insurance.

RE
http://www.cnn.com/2016/05/11/us/texas-fertilizer-plant-blast/index.htmlTown in shock over news that Texas fertilizer-plant explosion was deliberateBy Emanuella Grinberg and Holly Yan, CNN
Updated 10:40 PM ET, Wed May 11, 2016
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Story highlights
News that arson caused explosion in West, Texas, raises more questions than answers
"I don't want to blame anyone for it," resident says
(CNN)Rumors started swirling on Tuesday that the news was coming.
Residents of West, Texas, hoped they would finally learn what happened the night of April 17, 2013, when a deadly explosion at a fertilizer plant leveled their town. The blast devastated the small town about 70 miles south of Dallas, destroying 500 homes and killing 15 people, including 12 first responders.
Lifelong West residents Mike and Janet Sulak lost their home in the blast. They had suspicions as to what caused the fire based on bits and pieces of information over the years. Maybe an electrical fire caused the explosion, they thought, something accidental, unintentional, unforeseeable.
Nothing could prepare for them for the truth.
After conducting 400 interviews and lab work on evidence, investigators determined someone started the fire on purpose, officials from the Bureau of Alcohol, Tobacco, Firearms and Explosives said.
Texas blast leaves nearly 100-foot crater
Texas blast leaves nearly 100-foot crater 02:56
Authorities would not comment on whether they know of a suspect. But "we're headed in the right direction," ATF Special Agent in Charge Robert Elder said. The ATF is offering up to $50,000 for information leading to the arrest of whoever set the blaze.
The Sulaks watched the news conference in their family-owned pharmacy, West Drug. It left them in complete shock.
Instead of getting answers, they have more questions.
"I'm at a loss," Mike Sulak said. "I can't imagine the intent of the person who would've set it on fire."
By the numbers
15: People killed
500: Homes destroyed
37: City blocks damaged
2.5: Miles covered with debris
$2 million: Cost of investigation
'Like a nuclear bomb went off'
Families of the those killed have struggled to find answers to what happened on April 17, 2013.
Perry: Fire department was 'wiped out'
Perry: Fire department was 'wiped out' 01:13
That night, a fire broke out at the West Fertilizer Co. About 20 minutes later, the plant exploded with such force it caused a magnitude-2.1 earthquake.
"It was like a nuclear bomb went off," West Mayor Tommy Muska said.
Residents cope after fertilizer blast
Residents cope after fertilizer blast 02:09
A deafening boom echoed for miles. The blast stripped a 50-unit apartment complex of its walls and windows.
It was "massive -- just like Iraq, just like the Murrah (Federal) Building in Oklahoma City," said D.L. Wilson of the Texas Department of Public Safety.
Fertilizer plant explosion timeline
Fertilizer plant explosion timeline 03:12
The blast left a crater 93 feet wide and 12 feet deep.
It also wounded another 200 people in the town of 2,800.
Video showed moment of deadly blast
Tons of volatile material
The West Fertilizer Co. had warned state and local officials but not federal agencies that it had 270 tons of highly volatile ammonium nitrate on site, according to regulatory records.
Why did FEMA reject West disaster aid?
Why did FEMA reject West disaster aid? 02:15
The fertilizer company had been cited by federal regulators twice since 2006.
A U.S. Chemical Safety Board investigation concluded the explosion was preventable, board chairman Rafael Moure-Eraso said on the one-year anniversary of the blast.
"It resulted from the failure of a company to take the necessary steps to avert a preventable fire and explosion and from the inability of federal, state and local regulatory agencies to identify a serious hazard and correct it," Moure-Eraso said.
Town deals with blast tragedy
Town deals with blast tragedy 02:40
What life is like In West, Texas
Elder, the ATF special agent, said Wednesday that the owner of the plant has been cooperating with authorities.
Victims as heroes
The blast was so catastrophic, it damaged or destroyed houses across 37 blocks, including the home where the Sulaks raised their family.
They count themselves among the lucky ones. They were out to dinner in nearby Waco when the blast occurred. It damaged their home beyond repair but miraculously, their family pharmacy, West Drug, survived.
After more than two years of living with family they moved back to the site of their old home in December. Mike Sulak estimates that donations of money, materials and manpower from across the state saved them $15,000 in rebuilding costs.
"Words to describe it are tough. It brought us all together; we have shared a common experience."
Rebuilding continues elsewhere in town, Janet Sulak said. The nursing home has opened in a new location. This fall the Sulaks' grandchildren will no longer have to attend school in trailers, after the new high school opens. The Sokol gymnasium, a fitness hall with roots in the town's Czech heritage, is open again.
News like this reopens old wounds, she said. Many in town wish it would end.
"It keeps coming up all the time," she said. "Just let it rest, already."
Even if it was arson, part of her still believes it was an accident. Even if someone set the fire, surely it was never the intention for it to spread like it did.
"I don't want to blame anyone for it," she said. "But it happened and I guess we will have to accept whatever the board comes up with and move on from there."
Local residents attend a commemoration ceremony on April 21 for those that perished during the fertilizer explosion.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – Local residents attend a commemoration ceremony on April 21 for those that perished during the fertilizer explosion.
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Local residents attend a ceremony in West, Texas, on April 21.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – Local residents attend a ceremony in West, Texas, on April 21.
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Residents embrace after a Sunday service at St. Mary's Catholic Church on April 21, four days after the deadly explosion.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – Residents embrace after a Sunday service at St. Mary's Catholic Church on April 21, four days after the deadly explosion.
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Residents collect donations on Saturday, April 20.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – Residents collect donations on Saturday, April 20.
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A candlelight vigil is held at St. Mary's Catholic Church in West, Texas, on Thursday, April 18.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – A candlelight vigil is held at St. Mary's Catholic Church in West, Texas, on Thursday, April 18.
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Eric Garcia, 12, cries during a candlelight vigil in West, Texas, honoring the victims of the explosion on April 18. More than 200 people were injured and 50 homes destroyed in the small town.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – Eric Garcia, 12, cries during a candlelight vigil in West, Texas, honoring the victims of the explosion on April 18. More than 200 people were injured and 50 homes destroyed in the small town.
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People gather for a candlelight vigil at a church in West on April 18.
28 photos: West, Texas: A community mourns
Photos: West, Texas: A community mourns – People gather for a candlelight vigil at a church in West on April 18.
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Residents tend a prayer service at St. Mary's.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – Residents tend a prayer service at St. Mary's.
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A girl closes her eyes during the vigil.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – A girl closes her eyes during the vigil.
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A young mourner is comforted during the vigil on April 18.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – A young mourner is comforted during the vigil on April 18.
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People pray during a candlelight vigil at St. Mary's Church on April 18.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – People pray during a candlelight vigil at St. Mary's Church on April 18.
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Residents embrace after taking part in the vigil.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – Residents embrace after taking part in the vigil.
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A woman clasps her hands during the candlelight vigil on April 18.
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – A woman clasps her hands during the candlelight vigil on April 18.
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A young man holds a candle during the vigil.<a href="
http://www.cnn.com/2013/04/18/us/gallery/texas-explosion/index.html"> </a>
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – A young man holds a candle during the vigil.
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U.S. President Barack Obama attends a memorial service at Baylor University in Waco, Texas, on April 25. The memorial was held for those killed in the blast at a Texas fertilizer plant. Fourteen people, nearly all first responders, died in an explosion at the West Fertilizer Co. on April 17. <a href="
http://www.cnn.com/2013/04/18/us/gallery/texas-explosion/index.html">See photos from the explosion.</a>
28 photos: West, Texas: A community mourns
West, Texas: A community mourns – U.S. President Barack Obama attends a memorial service at Baylor University in Waco, Texas, on April 25. The memorial was held for those killed in the blast at a Texas fertilizer plant. Fourteen people, nearly all first responders, died in an explosion at the West Fertilizer Co. on April 17. See photos from the explosion.