Responders search the area around the Boston Public Library near the finish line of the Boston Marathon with a ladder truck in Boston Tuesday, April 16, 2013. Two bombs blew up seconds apart Monday at the finish line of one of the world's most storied races, tearing off limbs and leaving the streets spattered with blood and strewn with broken glass. At least three people were killed, including an 8-year-old boy, and more than 170 were wounded. (AP Photo/Winslow Townson)