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    Rod Aydelotte / Waco Tribune Herald

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    Fertilizer plant explosion in West, Texas

    The huge blast rocked a small Texas town causing an unknown number of deaths and destroying nearby homes.

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    Texas A&M students clean debris at a home in West, Texas, on May 4, 2013, that was damaged by the explosion at a fertilizer plant in West on April 17. Investigators have determined that ammonium nitrate was the cause of the explosion at the plant that killed 14 people and injured some 200 more, a spokeswoman for the Texas state fire marshal's office said on May 7.

    AP / AP
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    Investigators look through the debris of the destroyed fertilizer plant in West, Texas, on May 2, 2013.

    Pool via AP / Pool via AP
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    An honor guard stands in front of caskets prior to a memorial service on April 25, 2013, for first responders who died in the fertilizer plant explosion in West, Texas.

    AP / AP
  • Image: Firefighter Layton salutes a procession of vehicles in honor of fallen firefighter Harris, following funeral services at St. Mary's Catholic Church of the Assumption in West

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    Firefighter Charles Layton salutes a procession of vehicles in honor of fallen firefighter Captain Kenneth "Luckey" Harris Jr. following funeral services at St. Mary's Catholic Church of the Assumption in West, Texas, on April 24, 2013. Harris Jr., 52, was killed when he rushed to the scene of the fertizlizer plant explosion.

    Reuters / Reuters
  • Image: A fertilizer plant explosion destroys part of the town of West, Texas

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    A mourner wipes away tears during a candlelight vigil April 18 at St. Mary's Church after a fertilizer plant exploded in West, Texas. Search squads were still picking through the smoking devastation of the Texas fertilizer plant late Thursday, 24 hours after a massive explosion.

    EPA / EPA
  • Image: Residents take part in a candle light vigil at St. Mary's Catholic Church in Texas

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    Residents take part in a candle light vigil at St. Mary's Catholic Church in remembrance of those who lost their lives or were injured in the massive explosion at the fertilizer plant in West, Texas, April 18, 2013. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: DISASTER ENVIRONMENT AGRICULTURE RELIGION)

    Reuters / Reuters
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    Fertilizer plant explosion in West, Texas

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    The remains of a fertilizer plant destroyed by an explosion in West, Texas, is seen on April 18.

    Houston Chronicle via AP / Houston Chronicle via AP
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    This aerial photo shows the remains of a burned and damaged school following a Wednesday night fertilizer plant explosion in West, Texas, on April 18.

    AP / AP
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    This aerial photo shows burned down and damaged homes following an explosion Wednesday of a near by fertilizer plant in West, Texas, on April 18.

    AP / AP
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    Workers with Johnson Roofing cover up the window frames of Carol Anne Kocian's home with sheets of plywood on April 18, 2013 in West, Texas. Kocian lives very close to the site of the deadly fertilizer plant explosion that blew out all the windows of her house Wednesday.

    Getty Images / Getty Images
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    Jackie Arias picks up donated clothing at Veterans of Foreign Wars Post 4819 after her house was damaged on April 18, in West, Texas.

    Getty Images / Getty Images
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    Search and rescue operations are conducted at an apartment building destroyed by an explosion at a fertilizer plant in West, Texas, April 18.

    Corbis / Corbis
  • Image: Investigators stand amid the aftermath of a massive explosion at a fertilizer plant in the town of West, near Waco, Texas

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    Investigators stand amid the aftermath of a massive explosion at a fertilizer plant in the town of West, near Waco, Texas, on April 18, 2013.

    Reuters / Reuters
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    The remains of the the West Fertilizer Co. plant smolder in the rain on Thursday, April 18, in the town of West, Texas.

    Houston Chronicle via AP / Houston Chronicle via AP
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    Firefighters conduct search and rescue operations at an apartment building destroyed by an explosion at a fertilizer plant in West, Texas, April 18.

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    A firefighter stands on a rail line surveying the remains of a fertilizer plant destroyed by an explosion in West, Texas, April 18.

    AP / AP
  • Image: Smith removes broken glass from the West Thrift Shop after an explosion at a fertilizer plant damaged the store in West Texas

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    Brandon Smith removes broken glass from the West Thrift Shop after an explosion at a fertilizer plant damaged the store in the town of West, Texas, April 18.

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    A search and rescue dog is led through the blast zone around a fertilizer plant that exploded in West, Texas, April 18.

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    Firefighters search the blast zone following an explosion at a fertilizer plant in West, Texas, April 18.

    AP / AP
  • Image: Between 5 - 15 casualties feared after West Texas explosion.

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    A plume of smoke fills the air after an explosion at a fertilizer plant in West, Texas, April 17. This photo was taken by an eyewitness in his front garden.

    Demotix via Corbis / Demotix via Corbis
  • Image: A fertilizer plant explosion destroys part of the town of West, Texas

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    The remains of a fertilizer plant and other buildings and vehicles smolder after the plant exploded in West, Texas, April 17.

    EPA / EPA
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    An image taken from a cell phone video shows the moment of the explosion at a Texas fertilizer plant.

    Derrick Hurtt via TODAY / Derrick Hurtt via TODAY
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    A man injured by the West Fertilizer plant explosion is treated by nurses from Hillcrest Baptist Medical Hospital in Waco, Texas, April 17.

    Waco Tribune Herald via AP / Waco Tribune Herald via AP
  • Image: A fertilizer plant explosion destroys part of the town of West, Texas

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    Firefighters fight the remains of a fertilizer plant fire after the plant exploded in West, Texas, April 17.

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    Firefighters use flashlights to search a destroyed apartment complex near a fertilizer plant that exploded earlier in West, Texas, April 18.

    AP / AP
  • Image: Evacuating people who live near the Waco fertilizer plant

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    Emergency workers evacuate the elderly from a damaged nursing home following an explosion at a fertilizer plant in West, Texas, April 17.

    Waco Tribune Herald via AP / Waco Tribune Herald via AP
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    A view from above of the staging area on an athletic field in West, Texas following the explosion at a fertilizer plant.

    NBCDFW / NBCDFW
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    With smoke rising in the distance, a law enforcement officer runs a checkpoint about half a mile from the West Fertilizer Company, April 18.

    Getty Images / Getty Images
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    A person watches as emergency workers fight a house fire after a nearby fertilizer plant exploded in West, Texas, April 17.

    Waco Tribune Herald via AP / Waco Tribune Herald via AP
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    A fire still burns in a apartment complex destroyed near a fertilizer plant that exploded earlier in West, Texas, April 18.

    AP / AP
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    An Instagram photo shows smoke rising from the scene of a fertilizer plant explosion near Waco, Texas. A massive explosion at the West Fertilizer Company injured more than 100 people and left buildings damaged for blocks in every direction. The death toll from the blast, which occured as firefighters were tackling a blaze, is still unknown.

    AP / AP
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    Blown out plate glass windows lay shattered on the sidewalk and street after an explosion at the West Fertilizer Company, in West, Texas, early April 18

    Getty Images / Getty Images
  • Image: Baylor Students

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    Baylor University students hold a candle light vigil outside Waco Hall for the victims of the West Fertilizer Company plant explosion, April 17.

    Waco Tribune Herald via AP / Waco Tribune Herald via AP