Article Photos: Boston bombing suspect captured, brother killed 30/55

A sign along I-93 in Medford, Mass. announces no MBTA service Friday, April 18, 2013. Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during their getaway attempt in a long night of violence that left one of them dead and another still at large Friday, authorities said as the manhunt intensified for a young man described as a dangerous terrorist. (AP Photo/Elise Amendola)