TIMBUKTU, Mali ? IT?S time for my annual win-a-trip journey, in which I take a university student with me on a reporting trip to Africa. So I?m here in Timbuktu, the ancient crossroads of the Sahara, with Erin Luhmann, a journalism student from the University of Wisconsin, navigating roadblocks and jittery soldiers in a city that Islamist militants ruled until early this year.