March 4, 2009 5:16 pm Why Scientists Are Smiling Stimulus package dangles billions of dollars in front of some of the nation’s top researchers. US & World Videos 2:45 La Jolla Concours d'Elegance classic race cars 1:39 Troops Endure Hyper-Realistic Training 2:07 New study links consuming red meat with dementia 2:05 Police find, return dozens of abandoned Amazon packages 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl