Did you hear about Samuel L. Jackson’s cleaning job in Memphis, Tennessee? It was for a very good cause. The actor was among a team of volunteers who helped spruce up the National Civil Rights Museum. The museum is built around the former Lorraine Motel, where Doctor Martin Luther King was shot to death on April 4th, 1968. This year marks the 40th anniversary of the assassination. During his time on the site, Jackson helped put a new coat of paint on a balcony railing near where King fell mortally wounded after the shooting. Jackson is in Memphis working on a movie.