The six astronauts of STS-133 have taken their seats inside space shuttle Discovery this afternoon and the countdown continues to go well leading up to a liftoff at 4:50 p.m. EST. Commander Steve Lindsey and Pilot Eric Boe are in the two forward seats on the flight deck with Mission Specialists Alvin Drew and Nicole Stott sitting behind them. On the lower level or middeck, astronauts Steve Bowen and Michael Barratt have been strapped into their seats.