Some 4000 people are expected to celebrate at the California School for the Deaf in Freemont, California this weekend. It's the institution's 150th anniversary. Former NFL star Ronnie Lott will speak. There will be a parade, homecoming games, banquet and dance along with class reunions. The school now serves nearly 500 students. About 90% of the staff is deaf. It was founded in May 1860. It moved to UC Berkeley in 1869 and back again to Freemont in 1980.