The White House has dispatched the lovable Sesame Street resident Elmo to spread the word on ways to ward off the H1N1 flu, but for those who find the red, fluffy Muppet a little too soft, there's Dr. John D. Clarke -- the MD who can rap. In a minute-long video, the Long Island doctor spits rhymes about washing one's hands and using hand sanitizer Clarke is one of 10 finalists competing for a $2,500 prize from the Department of Health and Human Services for the best H1N1 prevention video. After picking the finalists from more than 200 entries, the...