Science and technology

Associated Press
In this Nov. 16, 2011, photo provided by NASA, the SpaceX Dragon capsule is lifted to be placed atop its cargo ring inside a processing hangar at Cape Canaveral Air Force Station in Florida. The first commercial cargo run to the International Space Station has been delayed again for more software testing.  Space Exploration Technologies Corp., better known as SpaceX, was aiming for a Monday, April 30, 2012, liftoff of its Falcon rocket and Dragon capsule. But on Wednesday, May 2, the California-based company announced its latest postponement and said a new launch date had not been set. (AP Photo/NASA, Kim Shiflett)

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