Much of the central and eastern parts of the U.S. will experience rain showers and scattered thunderstorms, forecasters said.

Instead, the closest open metro exit to the National Mall will be at 12th and Independence Avenue, Southwest. Other nearby stations include Foggy Bottom, Farragut West and North, McPherson Square, Metro Center, Federal Triangle, and Archives-Navy Memorial stations.

Tight security ensured a family-oriented atmosphere at the U.S. Army's 250th anniversary parade despite liberal opposition and protests nearby.