Associated Press: The planned launch of a rocket carrying a NASA satellite designed to track global warming has been postponed.
NASA writes in a tweet that the countdown was stopped at 46 seconds because of a failure in the launch pad water flow. A message left with NASA was not returned.
The Delta 2 rocket was supposed to launch early Tuesday over Vandenberg Air Force Base.
The rocket is the second try for NASA. In 2009, the space agency launched a replica satellite aboard a smaller and cheaper Taurus XL...