STS-114 was the first of two Return to Flight missions following the STS-107 Columbia disaster and the second time Space Shuttle Discovery was used for a Return to Flight mission, the first being STS-26 after the Challenger accident. Coincidentally, STS-114 launched at the exact same local time, 10:39:00 a.m. Eastern, as Columbia had on STS-107. It was also the second Shuttle flight commanded by a woman, Eileen Collins, who had previously commanded STS-93. During the mission, Discovery’s crew resupplied the International Space Station, tested new safety upgrades and procedures, and conducted the first ever in space repair of a Shuttle's heat shield. However, a large foam shedding event during launch showed that NASA had not fully resolved the issue that led to Columbia’s loss. As a result, the Shuttle fleet was grounded again. Further delays followed after Hurricane Katrina damaged NASA’s Michoud Assembly Facility in New Orleans, where External Tanks were built, resulting in a yearlong pause in Shuttle flights until STS-121 in July 2006.