President Obama To Call Crews Tonight

The joined crews of Discovery and the International Space Station will field a VIP call from President Obama tonight as they head into the home stretch of the shuttle's 39th and final flight.

The call is slated to begin at 5:03 p.m., and the crews were notified in messages beamed up from Mission Control in Houston this morning.

You can watch the call live here in The Flame Trench. Click the NASA TV box on the right side of this page to launch our NASA TV viewer and be sure to refresh this page for periodic updates.