August 24, 2012 5:52 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 1:37 Atlanta water main breaks, leaving many without water 1:32 Daisy Ridley says training for ‘Young Woman And The Sea' was a ‘feat' 2:37 Biden administration expected to announce border executive action 0:57 Michelle Obama's mother, Marian Robinson, dies at 86 16:31 Johnny Wactor's co-worker Anita Joy recalls trying to save him after shooting