Forensic mappers work the crater at the site of a fire and explosion in West, Texas, on April 24, 2013. The West Fertilizer Co. plant in the small Texas town exploded days earlier on April 17, killing 15 people.
Texas fertilizer plant explodes —
Forensic mappers work the crater at the site of a fire and explosion in West, Texas, on April 24, 2013. The West Fertilizer Co. plant in the small Texas town exploded days earlier on April 17, killing 15 people.
Reuters /Landov
Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives search the bank of rail tracks for evidence at the site of the explosion.
Texas fertilizer plant explodes —
Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives search the bank of rail tracks for evidence at the site of the explosion.
Reuters /Landov
Search and rescue workers comb through what remains of a 50-unit apartment building, in foreground, and a nursing home on April 18, 2013.
Texas fertilizer plant explodes —
Search and rescue workers comb through what remains of a 50-unit apartment building, in foreground, and a nursing home on April 18, 2013.
Chip Somodevilla/Getty Images
The remains of an apartment complex lie on cars.
Texas fertilizer plant explodes —
The remains of an apartment complex lie on cars.
Erich Schlegel/Getty Images
A deer head mount sits inside a car parked next to an apartment complex damaged in the explosion.
Texas fertilizer plant explodes —
A deer head mount sits inside a car parked next to an apartment complex damaged in the explosion.
Erich Schlegel/Getty Images
A Valley Mills Fire Department firefighter walks through the remains of an apartment complex next to the fertilizer plant.
Texas fertilizer plant explodes —
A Valley Mills Fire Department firefighter walks through the remains of an apartment complex next to the fertilizer plant.
Erich Schlegel/Getty Images
Smoke rises from the rubble of a house next to the fertilizer plant.
Texas fertilizer plant explodes —
Smoke rises from the rubble of a house next to the fertilizer plant.
Erich Schlegel/Getty Images
A railroad boxcar lies on its side near the plant.
Texas fertilizer plant explodes —
A railroad boxcar lies on its side near the plant.
Erich Schlegel/Getty Images
A Texas State Trooper stops people from entering a neighborhood near the plant.
Texas fertilizer plant explodes —
A Texas State Trooper stops people from entering a neighborhood near the plant.
Kevork Djansezian/Getty Images
A chimney is the only part of a home left standing after the explosion.
Texas fertilizer plant explodes —
A chimney is the only part of a home left standing after the explosion.
Chip Somodevilla/Getty Images
Brandon Smith removes broken glass from the West Thrift Shop.
Texas fertilizer plant explodes —
Brandon Smith removes broken glass from the West Thrift Shop.
MIKE STONE/REUTERS/LANDOV
Search and rescue workers comb through what remains of a 50-unit apartment building.
Texas fertilizer plant explodes —
Search and rescue workers comb through what remains of a 50-unit apartment building.
Chip Somodevilla/Getty Images
The West Fertilizer Co. lies in ruins.
Texas fertilizer plant explodes —
The West Fertilizer Co. lies in ruins.
Chip Somodevilla/Getty Images
A sheriff's deputy comforts a woman at a command post.
Texas fertilizer plant explodes —
A sheriff's deputy comforts a woman at a command post.
Mike Fuentes/Bloomberg via Getty Images
Remains of the fertilizer plant burn in the early morning after the explosion.
Texas fertilizer plant explodes —
Remains of the fertilizer plant burn in the early morning after the explosion.
Mike Stone/ Reuters
Water is sprayed on the remains of the plant.
Texas fertilizer plant explodes —
Water is sprayed on the remains of the plant.
Mike Stone/Reuters
With smoke rising in the distance, a law enforcement officer runs a checkpoint at the perimeter about half a mile from the plant.
Texas fertilizer plant explodes —
With smoke rising in the distance, a law enforcement officer runs a checkpoint at the perimeter about half a mile from the plant.
Chip Somodevilla/Getty Images
Waco Police spokesman William Swanton speaks to reporters about the explosion.
Texas fertilizer plant explodes —
Waco Police spokesman William Swanton speaks to reporters about the explosion.
Mike Stone/Reuters
Glass from blown-out windows lies shattered on the sidewalk and street after the blast.
Texas fertilizer plant explodes —
Glass from blown-out windows lies shattered on the sidewalk and street after the blast.
Chip Somodevilla/Getty Images
Shattered glass covers items in front of a thrift store.
Texas fertilizer plant explodes —
Shattered glass covers items in front of a thrift store.