Rep. Gabrielle Giffords, shown here with her husband, NASA astronaut Mark Kelly, will attend her husband's space shuttle launch in Florida on Friday. (Associated Press)

When asked by a reporter whether NASA was aware of the clash with the Royal Wedding, NASA's associate administrator for space operations, Bill Gerstenmaie, told “We work beta constraints and we work launch-range constraints. I haven't yet put on our manifest charts ‘wedding constraints.’ ”

Giffords was spotted boarding a flight with a nurse by local news affiliate KHOU, which reported that she walked up the stairway to the plane by herself. It’s the first time she’s been seen in public since the shooting in Tucson.

Once the crew of Endeavor has made it into space, Google plans to launch a live interview with them streamed onto YouTube on May 2. People can submit their questions now.

We’ll have live coverage of Endeavor’s liftoff here Friday. The launch is set for 3:47 p.m. EDT.