FILE – In this April 15, 2013, file photo, medical workers aid injured people following an explosion at the finish line of the 2013 Boston Marathon in Boston. Dzhokhar Tsarnaev was convicted Wednesday, April 8, 2015, in federal court in Boston on multiple charges in the bombings. Three people were killed and more than 260 were injured when twin pressure-cooker bombs exploded near the finish line. (AP Photo/Charles Krupa, File)