MAIDUGURI, Nigeria ? A car bomb in a marketplace in Maiduguri, the northeast Nigerian city that is the birthplace of Boko Haram extremism, killed at least 56 people on Tuesday, the leader of a civilian group that recovered the bodies said. Sadiq Abba Tijjani, leader of the Civilian Joint Task Force, told the Associated Press his group recovered at least 56 dead bodies at the blast site, mostly...