Saturday, 15 June, 2002, 12:06 GMT 13:06 UK Under the same sky By Mark Doyle BBC West Africa correspondent When we told our four-and-half-year-old son Alex that we were moving to London, he thought about it for a long time. The idea was difficult for him to grasp because, although he has been to England on visits, he has lived most of his life in West Africa. Alex thought hard about it, but then, remembering that he would travel on an airplane, he looked up at the sky and asked: "Daddy, is it the same sky all the way from...