Shuttle Atlantis unwrapped ahead of public debut

The electric sports car shrouded inside the nose of the first Falcon Heavy rocket may conjure notions of a flight of fancy, but SpaceX founder Elon Musk says the powerful new launcher awaiting blastoff Tuesday from Florida’s Space Coast has a lot to prove.

Orbital ATK’s bid to join the U.S. military’s roster of rockets to haul the most critical national security satellites into orbit faces stiff competition from entrenched launch providers and billionaire entrepreneurs, but the company is confident its Next Generation Launch system will win one of three funding agreements the Air Force is expected to award this summer.

SpaceX is expected to transfer its next Falcon 9 rocket to launch pad 39A at NASA’s Kennedy Space Center in Florida on Monday with a direct-to-home television broadcast satellite on-board, setting up for a two-and-a-half hour predawn launch window Tuesday.