National Park Services Ranger Paul K. Maisto (Week 7 photos)

Paul K. Maisto, a National Park Services Ranger since 2007, surveys the National Mall during his sunset shift on Friday, Oct. 16, 2015, in Washington, D.C. (Photo by Alex Theriot)

National Park Ranger Paul K. Maisto interacts with photographers and models during a sunset photo shoot on Oct. 16, 2015, in Washington, D.C. (Photo by Alex Theriot)

National Mall and Memorial Parks Ranger Paul K. Maisto, a National Park Services Ranger since 2007, poses in his "office" on Oct. 16, 2015, in Washington, D.C. (Photo by Alex Theriot)

Paul K. Maisto, a National Mall and Memorial Parks Ranger, helps a tourist find the nearest Metrorail station on Oct. 16, 2015, in Washington, D.C. (Photo by Alex Theriot)

National Park Services Ranger, Paul K. Maisto, gives a D.C. student a history lesson on the Lincoln Memorial on Oct. 16, 2015, in Washington, D.C. (Photo by Alex Theriot)