Blast-devastated U.S. city imposes curfew, allowing some residents to return home

Flags are lowered to half mast in West, Texas, the United States, April 20, 2013. The Authorities of the city of West, the U.S. state of Texas, on Saturday declared to impose curfew while allowing some of the evacuated residents to return home in the afternoon, more than two days after a powerful explosion at a local fertilizer plant that almost razed the town. (Xinhua/Zhang Yongxing)