In an effort to tap into anti-war sentiment, billboards will appear in New York and Los Angeles this month declaring "War Is Over! If You Want It." The statement is not so much political as commercial: independent film distributor Lionsgate is using them to promote its documentary "The U.S. vs. John Lennon," set to open September 15 in both cities. The billboards are a reproduction of those created and posted by Lennon and wife Yoko Ono in 11 cities in 1969 as a protest against the Vietnam War. Nicole Sperling reports.