Space shuttle Discovery’s roll from Launch Pad 39A to the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on Tuesday, Dec. 21, now is targeted to start at 10 p.m. EST. Discovery is expected to be securely back in the VAB by 5 a.m. Wednesday.

As dates and times of this event are subject to change, updates are available by calling 321-867-2525.

The move, known as rollback, was delayed early Tuesday morning to allow technicians to resolve an issue with the leveling system on the crawler transporter.

The media photo opportunity of the shuttle’s move back into the VAB has been cancelled due to the timing of the operation.

Images of the events will be posted Wednesday on Kennedy’s Media Gallery at: http://mediaarchive.ksc.nasa.gov  

Video highlights of the rollback will air on the NASA TV Video File segment Wednesday morning.

For NASA TV downlink information, schedules and links to streaming video, visit: http://www.nasa.gov/ntv

For more information about Discovery’s STS-133 mission and its crew, visit: http://www.nasa.gov/shuttle