Indian authorities inspect a crater left by a suspected meteorite in southern Tamil Nadu state. Local officials say the impact killed a bus driver and injured three others on Feb. 6. STR/AFP/Getty Images hide caption

toggle caption STR/AFP/Getty Images

Police officers take positions as they arrive at scene of a bus explosion in the center of Tunis, the capital city of Tunisia, Tuesday. Hassene Dridi/AP hide caption

toggle caption Hassene Dridi/AP