After being scrubbed the day before, NASA will attempt to launch a Pegasus XL rocket from a carrier jet on Thursday.
The L-1011 "Stargazer" carrier jet is cruising at an altitude of 40,000 feet east of Daytona Beach, Fla. It is expected to drop the rocket around 9:30 p.m.
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A launch attempted on Wednesday was scrubbed due to bad weather.