Technicians at NASA’s Kennedy Space Center in Florida today are running through a series of tests focused on making sure space shuttle Discovery is ready to have its payload connected inside the cargo bay. The shuttle’s processing continues for its targeted launch in September on the STS-133 mission. The payload is also on the minds of Discovery’s astronauts as they review installation procedures for the Express Logistics Carrier-4, a high-tech platform that will store spare parts on the outside of the International Space Station. The shuttle will take the platform and the Permanent Multipurpose Module to the station during the mission.