LAGOS, Nigeria (AP) — Victor Ahansu was barely awake with his wife and baby twins before the grinding sound of bulldozers woke them. It was all the warning the family had, he said, before fleeing mass evictions in their historic community of Makoko in Lagos. Their house was demolished on Jan. 11, one of thousands taken down by the ongoing operation. Now the 5-month-old twins and their parents live in a wooden canoe, with a woven plastic sack for shelter from the rain. The thump of hammers fills