top u.s. officials travel havana feb. 16 sign aviation pact restore schedule airline service unite state cuba first time 50 years u.s. transportation department say friday sign bring effect arrangement cold war foes agree upon dec. 16. u.s. airlines still must apply permission u.s. regulators fly specific rout sell ticket cuba charter flight already connect countries accord expect increase tourism business communist-ruled island airlines expect gradual payout arrangement well u.s. transportation department secretary anthony foxx assistant secretary state economic business affairs charles rivkin participate sign transportation department say news release u.s. cuba sign aviation pact feb. 16