Sept. 17 (UPI) -- NASA and aerospace manufacturer Northrop Grumman announced Tuesday night a delay in the arrival of their Cygnus XL cargo craft to the International Space Station due to an apparent engine problem. The craft with 11,000 pounds of scientific equipment and cargo launched Sunday evening, with plans to dock with the orbital laboratory on Wednesday. That schedule has now been shelved, as NASA said in a blog post that a new arrival date and time was under review after the Cygnus XL's