the flight control systems, and the reaction control system jets. The crew took some time out in the morning to speak to the media, and then had a deorbit preparation briefing with the ground team. Melroy performed a burn of the orbiter's engines in the afternoon, an orbit adjustment burn done to refine the orbiter's trajectory for the two Wednesday landing opportunities at Kennedy Space Center. NASA managers officially cleared Discoverys heat shield for landing after reviewing the data sent down by the final inspection on Monday. November 7 (Flight day 16, Landing) The crew of Discovery got to work preparing for landing following their wake up call. NASA did not activate either Edwards Air Force Base, or White Sands, as the weather looked favorable for both landing opportunities at Kennedy. The weather forecast at the Shuttle Landing Facility called for good visibility, with mostly sunny skies, although the headwinds would be evaluated, as they had been peaking at . Due to the sleep shifting done by the crew earlier in the mission to schedule the extra mission days, the landing was done on what is called a "descending" node entry. Unlike ascending node entries, this entry trajectory brought the shuttle diagonally across the United States for the first time since STS-107. The shuttle passed over Vancouver, British Columbia, Canada, and angled down towards Florida. Once the orbiter reached Florida, Melroy performed a 195-degree right overhead turn along the heading alignment cone (HAC) in order to line up for a landing on Runway 33. The first landing opportunity began with a deorbit burn at 16:59 UTC and finished with a landing at 13:01 EST. The deorbit burns were done to slow the orbiter's speed and to drop it out of freefall orbit and on target for the designated runway. Discovery's payload bay doors were closed at 14:13 UTC, and the crew began fluid loading at 16:00 UTC. Fluid loading is a procedure that involves drinking high salt content fluids, which allows the astronauts to adjust to the return to gravity, and reduces the chance of hypotension upon returning to Earth. Shortly after 16:00 UTC, the crew began to get into their launch and entry suits, and ingress into their respective seats for landing. At 16:50 UTC, Entry Flight Director Bryan Lunney gave the crew the "go" for deorbit burn. The initiation of the burn committed Discovery to landing. The burn