CAPE CANAVERAL, Fla. -- NASA will be announcing at 10 a.m. today where the retiring space shuttles will go on display once the program ends this summer.

The Evergreen Aviation and Space Museum in McMinnville already has a spot in its museum that is shuttle-ready and hopes for the best.

Should Evergreen get a shuttle, it would have an aviation fan trifecta with the Spruce Goose and SR 71 Blackbird spy plane.

Twenty-one museums and centers around the country put in bids for the spaceships. NASA is disclosing the winners Tuesday on the 30th anniversary of the first space shuttle launch in 1981.

The Kennedy Space Center in Florida and the Johnson Space Center in Houston are leading contenders.

The shuttle program is winding down with only two more flights left. Shuttle Discovery ended its flying career last month and it's going to the Smithsonian Institution in Washington.

Up for grabs are shuttles Endeavour and Atlantis and the prototype Enterprise. That Enterprise is being replaced by shuttle Discovery at the Smithsonian, freeing that craft for another location.

Other contenders are the Air Force Museum in Dayton, Ohio and museums in New York City, Seattle and Chicago.

Officials at Seattle's Museum of Flight have their fingers crossed, waiting for Tuesday's announcement of where retiring space shuttles will be displayed.

The museum near Boeing Field is one of 21 museum and science centers around the country hoping to land one of the spaceships. A new building called the Space Gallery is being prepared for the display.

– The Associated Press