December 7, 2009 9:36 am New on DVD: Harry Potter, Public Enemies and Lost DVD editions of “Harry Potter and the Half Blood Prince,” “Public Enemies,” “Lost,” and more give a glimpse behind-the-scenes. US & World Videos 1:45 NYPD enters Columbia University in riot gear to clear protest 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look 1:49 New guidelines say women should be screened every other year for breast cancer starting at 40 2:28 King Charles returns to public duties amid cancer diagnosis