They're counting down at NASA ahead of Thursday's long-awaited debut test flight of a U.S. spaceship designed to fly astronauts beyond Earth's orbit of the sun for the first time since the 1960s.<br/> <br />NASA administrator Charles Bolden says everyone at the agency is excited.<br/> <br />NASA ADMINISTRATOR CHARLIE BOLDEN SAYING:<br/> <br />"Tomorrow morning you will see us press harder than we've pressed before because for the first time in more than 40 years, this nation is going to launch a space craft intended to carry humans beyond the Earth's orbit. That is a big deal."<br/> <br />An unmanned version of an Orion capsule is scheduled to lift off aboard a Delta 4 Heavy rocket at 7:05 a.m. Eastern from Cape Canaveral Air Force Station in Florida.<br/> <br />Program Manager Mark Geyer leads the project.<br/> <br />(SOUNDBITE) (English) NASA ORION PROGRAM MANAGER MARK GEYER SAYING:<br/> <br />"It does help this is unmanned. It's important this is unmanned because we actually structured the test to fly the riskiest p
