Local residents attend a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)

Local residents attend a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)

Three kids attend a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)

Local residents attend a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)

Local residents attend a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)

Members of the Knights of Columbus, one of the world's largest Catholic fraternal service organization, participate in a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)

Members of the Knights of Columbus, one of the world's largest Catholic fraternal service organization, participate in a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)

Local residents attend a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)

Members of the Knights of Columbus, one of the world's largest Catholic fraternal service organization, participate in a commemoration ceremony for the deceased people during the furtilizer explosion at a church in West, Texas, April 21, 2013. The powerful blast occurred around 7:50 p.m. local time Wednesday at the fertilizer plant in West, a small town some 320 km north of Houston, Texas, killing at least 14 people and injuring about 200 others. Another 60 remained unaccounted for in the blast, according to local officials. (Xinhua/Wang Lei)