December 14, 2009 10:28 pm Sigourney Weaver: From “Aliens” to “Avatar” Sigourney Weaver discusses James Cameron‘s ability to write strong female characters and how far technology has progressed since “Aliens.” 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