The story

Weather forced NASA on Monday to scrub a launch of space shuttle Endeavour, marking the spacecraft's third takeoff postponement in three days and fifth since mid-June.

Monday's attempt was scheduled for 6:51 p.m., but storm cells with lightning were within 20 nautical miles of the launch area, violating safety guidelines, NASA said.

"The vehicle and our teams were ready, but the weather has just bitten us again," launch director Pete Nickolenko told the shuttle crew. Read full article »

CNN's Dick Uliano contributed to this report.

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