(14 Feb 1995) STORYLINE: T/I: 10:21:44 DSSO 10:11:04 DSSE1 As western warships waited off the the coast of Somalia as part of "Operation United Shield" on Sunday (12/2), the United Nations stepped up the evacuation of its forces there. As the UN's failed two-year mission drew to a close, 450 Pakistani peace-keeping troops flew out of Mogadishu airport. Marines from the five-ship Italian battle group stationed off the Somali coast are preparing for possible close quarter combat if the Mogadishu