Awwal 03, 1432 H/April 7, 2011, SPA -- Next Tuesday marks the 30th anniversary of the first space shuttle launch. As the big day draws near, the focus is not so much on the past but the future, AP reported. Where will the shuttles wind up once the program winds down? Twenty-one museums and science and visitor centers around the country are vying for one of NASA's three retiring spaceships. They'll find out Tuesday on the 30th anniversary of Columbia's maiden voyage. NASA Administrator Charles Bolden Jr. is making the final decision. He'll announce the winners while marking the 30-year shuttle anniversary at Kennedy Space Center in Florida. The festivities could be delayed if the federal government shuts down because of a budget dispute.