CAPE CANAVERAL, Fla. (AP) — The world's first private supply ship flew tantalizingly close to the International Space Station on Thursday, acing a critical test in advance of the actual docking. The unmanned SpaceX Dragon capsule flew within 1½ miles of the orbiting lab as it performed a practice lap and checkout of its communication and navigation systems. Officials at NASA and the SpaceX company declared the rendezvous a success and said the historic linkup is on track for Friday.