In this Dec. 2, 2015, photo, Republican presidential candidate Donald Trump speaks during a campaign rally at the Prince William County Fair Ground in Manassas, Va. (AP Photo/Cliff Owen)
Ciaraan Roche of Manassas, Va., grabs a selfie on his camera phone as he stays indoors and out of the heat while working out at Vertical Rock Indoor Climbing Center, Manassas, Va., Thursday, September 4, 2014. (Andrew Harnik/The Washington Times)
Grace Freeman, left, and Lee Cantrell of Manassas, Va., right, stay indoors and out of the heat as they exercise at Vertical Rock Indoor Climbing Center, Manassas, Va., Thursday, September 4, 2014. (Andrew Harnik/The Washington Times)
Ciaraan Roche of Manassas, Va., top, and others stay indoors and out of the heat while working out at Vertical Rock Indoor Climbing Center, Manassas, Va., Thursday, September 4, 2014. (Andrew Harnik/The Washington Times)
Matt Fulton of Manassas, Va., stays indoors and out of the heat as he exercises at Vertical Rock Indoor Climbing Center, Manassas, Va., Thursday, September 4, 2014. (Andrew Harnik/The Washington Times)
Ben Martin, 10, of Gainesville, Va. stays indoors and out of the heat as he exercises at Vertical Rock Indoor Climbing Center, Manassas, Va., Thursday, September 4, 2014. (Andrew Harnik/The Washington Times)
Christian Weiss of Manassas, Va., stays indoors and out of the heat as he exercises at Vertical Rock Indoor Climbing Center, Manassas, Va., Thursday, September 4, 2014. (Andrew Harnik/The Washington Times)
Ashley Fannon of Manassas, Va., laughs as she lays suspended just above the floor as her and her friends stay indoors and out of the heat at Vertical Rock Indoor Climbing Center, Manassas, Va., Thursday, September 4, 2014. (Andrew Harnik/The Washington Times)
Ben Martin, 10, of Gainesville, Va. stays indoors and out of the heat as he exercises at Vertical Rock Indoor Climbing Center, Manassas, Va., Thursday, September 4, 2014. (Andrew Harnik/The Washington Times)
Union soldiers built the Henry Hill Monument in Manassas, Virginia, to commemorate those who died during the First Battle of Bull Run. The monument was dedicated on June 13, 1865.
Ankita Vadiala of Manassas, Va., crosses her fingers as she spells the word "llanero" correctly during the semifinal round of the National Spelling Bee, Thursday, May 29, 2014, in Oxon Hill, Md. (AP Photo/ Evan Vucci)
**FILE** Steve Appleton, chief executive and chairman of Micron Technology, Inc., speaks Nov. 4, 2005, after Virginia Gov. Mark R. Warner announced Micron will create 860 new high-tech jobs during a ceremony at the company's Manassas, Va., location. (Associated Press/Potomac News)