The conservative prayer event was organized by Freedom 250, a public-private group working with the White House to organize the celebration of America's 250 birthday this summer.

The increased security presence was visible with forces from multiple departments lined up on the mall. WASHINGTON — Thousands of people gathered on the National Mall Sunday for a Freedom 250 prayer and rededication event honoring the nation’s upcoming 250th birthday, marking the first Freedom 250 event of the summer season in Washington.