West EMTs Russell Lebkowsky and Terase Alexander hug after a memorial service for the victims of the fertilizer plant explosion last week, at Baylor University in Waco, Texas, April 25, 2013. [Photo/Agencies]

Members of the audience cry during a memorial ceremony for victims of the fertilizer plant explosion in West, Texas, attended by US President Barack Obama and first lady Michelle Obama at Baylor University in Waco, Texas, April 25, 2013. [Photo/Agencies]