Boko Haram militants killed at least 23 security personnel in an attack on a military base, officials from Chad said on Tuesday. The attack took place on Monday night against a military base on the shores of Lake Chad, which sits on the tripoint of Chad, Niger, Nigeria and Cameroon. Dozens more Chadian soldiers were injured in the attack, which was eventually repelled. "Once again, the nebulous Boko Haram terrorist group carried out a cowardly attack last night on our military base at Barka