The West Fertilizer Co., shown from the air, lies in ruins after an explosion that killed 15 people, injured more than 150 and damaged houses and buildings for blocks in every direction. (Photo)

Photo by Chip Somodevilla

Above: The West Fertilizer Co., shown from the air, lies in ruins after an explosion that killed 15 people, injured more than 150 and damaged houses and buildings for blocks in every direction.