A fire at a power station knocked out electricity at London’s Heathrow Airport, forcing one of the world’s busiest airports to close. More than 100 flights that were in the air at the time were diverted, while thousands of travelers around the world scrambled to find new ways to their destinations. NBC News’ Raf Sanchez reports there’s no evidence of foul play but an investigation by counterterrorism officers is now underway.Read More