The line forms outside the Ferrell Center for a memorial service for the victims of the West, Texas fertilizer plant explosion last week, at Baylor University in Waco, Texas, April 25, 2013.[Photo/Agencies]

Firefighters salute as a procession of fire trucks and emergency vehicles pass under a flag before a memorial service for the victims of the West, Texas fertilizer plant explosion last week, at Baylor University in Waco, Texas, April 25, 2013.[Photo/Agencies]