May 31, 2013 9:18 am Runners Prepare to Rock ‘n' Run The marathon, which began in San Diego 16 years ago, takes over the central area of the county. Main roads and even highways are closed for the event. NBC 7’s Elena Gomez reports. US & World Videos 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 2:59 Keep these travel etiquette tips in mind this holiday season