August 24, 2012 9:52 am Bracing For Isaac Preparations ramp up as Isaac gains strength. Tropical Storm Isaac strengthened a little as it continued to move west toward the Dominican Republic and Haiti Friday, according to the National Hurricane Center in Miami. US & World Videos 1:07 Britney Spears spotted as authorities respond to alleged hotel incident 2:15 Prince William and Kate Middleton ‘going through hell,' friend claims (report) 8:01 Lady Gaga's outfit changes, Rihanna's bold looks and more iconic Met Gala moments 2:48 Taylor Swift fans react to Jake Gyllenhaal and Sabrina Carpenter's ‘SNL' appearance 2:05 Whoopi Goldberg reveals who will inherit her fortune