Ranger in D.C. quake video: 'I thought it was an attack'

The August 23 earthquake gave a jolt to east coasters unaccustomed to such natural phenomenon, but for U.S. Park Ranger Niki Williams, it felt very much like a terrorist attack.Williams was escorting a group of 20 tourists on a trip through the Washington Monument in Washington, D.C. on the observation deck near the top of the 555-foot structure when the white marble pyramidion began shaking and p