Robert Payne stands on his business property as he talks with a reporter, Thursday, Dec. 12, 2013, in Clifton, Texas. Payne runs RPA Associates, where he keeps ammonium nitrate inside a tall concrete ... more 
Robert Payne stands on his business property as he talks with a reporter, Thursday, Dec. 12, 2013, in Clifton, Texas. Payne runs RPA Associates, where he keeps ammonium nitrate inside a tall concrete silo once used for grain. (AP Photo/Tony Gutierrez) less 
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Associated Press | Photo By Tony Gutierrez
Sun, Dec 29, 2013 11:16 AM EST