In Yemen, ISIS has claimed responsibility for an explosion that killed at least 40 Yemeni army recruits in the southern city of Aden. The attack hit recruits as they lined up to enlist. Aden serves as the temporary capital of the Saudi-backed Yemeni administration, which is fighting Houthi rebels. Meanwhile, a British-made cluster bomb has been found in a Yemeni village, bolstering reports the Saudi-led, U.S.-backed coalition fighting the Houthis has been dropping the banned weapons. Amnesty International found the unexploded bomb in northern Yemen. Cluster bombs contain bomblets which fan out over a wide area and often fail to explode until civilians pick them up later.