CAPE CANAVERAL, Fla. – The next-to-last space shuttle flight has been delayed again.
Endeavour will now blast off no earlier than May 16. Shuttle managers announced the new date Friday.
NASA's youngest space shuttle should have flown to the International Space Station last Friday. But a heater malfunction halted the countdown. The trouble was traced to a switch box. Engineers discovered a blown circuit inside. A new box has been installed, but more testing is needed.