See who's on our live space shuttle broadcast today

Starting at 3:30 p.m. today, FLORIDA TODAY will be broadcasting live from the rooftop of our bureau at the Kennedy Space Center.

We'll have a series of live guests and news updates throughout the countdown today. Here's the lineup:

3:30 p.m.: Joe Oliva, Ares I-X program manager for ATK at KSC. He'll discuss the upcoming major test-flight for the NASA program aimed at sending astronauts back to the moon.

4 p.m.: Brian Breen, manager of the International Space Station program for United Space Alliance. He'll talk about station assembly, the expanded six-person crew and new capabilities.

4:30 p.m.: Lisa Rice, president of the Brevard Workforce Development Board Inc. She'll update progress helping the shuttle workforce transition as the program approaches a planned retirement next year.

5 p.m.: Matthew Fields, engineer and scientist with The Boeing Co., and a member of the International Space Station Test Team. He'l explain the new ISS solar array batteries that Endeavour astronauts plan to install during two of five spacewalks.

5:30 p.m.: Latest status report and, possibly, another special guest.

6 p.m.: Andrea Farmer, public relations manager at the Kennedy Space Center Visitor Complex. The complex is featuring exciting events to recognize the 40th anniversary of Apollo 11.

6:30 p.m.: Master Sgt. Scott McCormick of the Air Force 45th Space Wing Weather Squadron. He'll offer a real-time forecast for the 7:39 p.m. launch and assess NASA's chances for getting off the ground.