Roger Daltrey, right, of the British rock band The Who, and Robert Plant of Led Zeppelin joke around as they sign the guitar during a news conference at the Ronald Reagan UCLA Medical Center in Los Angeles, Friday, Nov. 4, 2011. Daltrey and Plant pledged to raise money to renovate part of the hospital pediatric floor into a separate space for patients ages 15 to 25. (AP Photo/Jae C. Hong)
