Matt Rourke / AP
Sally Thomas takes part in a National Day of Prayer event on Independence Mall in Philadelphia.
Dave Martin / AP
Stanhope Elmore High School Junior ROTC Cadet Mike Snyder bows his head in prayer during National Prayer Day ceremonies at the Dexter Avenue United Methodist Church in Montgomery, Ala.
Charlie Neibergall / AP
Patty Russo, of Melbourne, Iowa, and her husband Joe, left, pray during a National Day of Prayer gathering in the rotunda at the Iowa Statehouse on Thursday. Congress established the day of prayer in 1952 and in 1988 declared that it would be held every year on the first Thursday in May.
Eric Gay / AP
Kelly Boorse, left, and Francisca, right, join others during a National Day of Prayer event, Thursday at City Hall in San Antonio. Congress established the day of prayer in 1952 and in 1988 declared that it would be held every year on the first Thursday in May.
Barbara Gauntt / The Clarion-Ledger via AP
Members of the Pearl, Miss. Fire Department, from left, Pvt. Jeremy Rast, Lt. Ronnie Decell and Capt. Alvin Morris participate in a National Day of Prayer observance by the flagpole at Miskelly Furniture in Pearl, Miss. on Thursday, May 3. A brisk wind kept the flag flying strong and at half-mast for Pearl Police Investigator Mike Walter killed Tuesday, May 1 in the line of duty.