Italian policemen, background left, walk on the site where an explosive device went off outside "Francesca Morvillo Falcone" high school in Brindisi, Italy, Saturday, May 19, 2012. Several students were wounded. (AP Photo/Max Frigione)

Photo by: Max Frigione

Italian policemen, background left, walk on the site where an explosive device went off outside "Francesca Morvillo Falcone" high school in Brindisi, Italy, Saturday, May 19, 2012. Several students were wounded. (AP Photo/Max Frigione)