Clint Eastwood helped open a new movie theater on the national mall Wednesday evening and the Smithsonian Institution honored the actor and director for his six decades of work in American film. Eastwood, 81, visited the National Museum of American History to help dedicate the new Warner Bros. Theater as a space to present the history of Hollywood. Warner Bros. Entertainment donated $5 million in 2010 to renovate the museum's old Carmichael Auditorium into a modern theater with 3D projection capability. The new theater gives the Smithsonian its first space dedicated to film history, museum spokeswoman Melinda Machado said. The 264-seat theater will be able to screen silent films and first-run movies.