NASA is looking at June 28 for the 135th and final launch of the space shuttle Atlantis. Atlantis will journey to the International Space Station to deliver supplies, logistics, and spare parts. The shuttle will also fly a system that will test robot-powered refueling on existing spacecraft, and return a failed ammonia pump module.
Atlantis, as the Associated Press reported, was originally scheduled as an emergency backup mission for the crew of the Endeavor, which will launch in April. If all goes well with Endeavor, however, Atlantis will proceed as its own separate mission.
President Obama [...]