(AP) -- The Smithsonian Institution plans a four-day festival with NASA to welcome space shuttle Discovery into its collection in April.

The National Air and Space Museum announced plans Tuesday for more than 25 special exhibits, programs and activities to highlight the history of the 30-year and the future of space exploration.

Discovery is scheduled to leave NASA's in Florida on the back of a Boeing 747 on April 17 and fly over parts of the Washington area. The Smithsonian is planning "Spot the Shuttle" gatherings at various locations.

A formal ceremony is planned April 19 at the museum's Steven F. Udvar-Hazy Center next to Dulles International Airport in northern Virginia, where it will be displayed.