Spotters keep watch while waiting for Air Force One to land carrying President Barack Obama at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)Air Force One to lands carrying President Barack Obama at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)The door to Air Force One is opened after landing at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)Passengers depart Air Force One after it landed carrying President Barack Obama at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)Air Force One to lands carrying President Barack Obama at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)President Barack Obama departs Air Force One after landing at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)Air Force One to lands carrying President Barack Obama at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)President Barack Obama greens, from right, Pa. Governor Tom Wolf, Pittsburgh Mayor Bill Peduto and Allegheny County Executive Rich Fitzgerald at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)President Barack Obama greets invited guests after landing at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)President Barack Obama greets invited guests after landing at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)President Barack Obama holds a baby as he greets invited guests after landing at the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)President Barack Obama crosses his hands while speaking with Nathan Copeland as he controls a robotic arm with his mind in the exhibition hall of The White House Frontiers Conference at the University of Pittsburgh on Thursday, Oct. 13, 2016. Copeland is a quadriplegic with a brain implant that can allow him to control the remote arm and experience the sensation of touch through it. (Photo by Michael Henninger/Post-Gazette)President Barack Obama shakes hands and fist bumps with a robotic arm controlled by the mind of Nathan Copeland, at right, in the exhibition hall of The White House Frontiers Conference at the University of Pittsburgh on Thursday, Oct. 13, 2016. Copeland is a quadriplegic with a brain implant that can allow him to control the remote arm and experience the sensation of touch through it. (Photo by Michael Henninger/Post-Gazette)President Barack Obama speaks with Nathan Copeland as he controls a robotic arm with his mind in the exhibition hall of The White House Frontiers Conference at the University of Pittsburgh on Thursday, Oct. 13, 2016. Copeland is a quadriplegic with a brain implant that can allow him to control the remote arm and experience the sensation of touch through it. (Photo by Michael Henninger/Post-Gazette)President Barack Obama shakes hands and fist bumps with a robotic arm controlled by the mind of Nathan Copeland, at right, in the exhibition hall of The White House Frontiers Conference at the University of Pittsburgh on Thursday, Oct. 13, 2016. Copeland is a quadriplegic with a brain implant that can allow him to control the remote arm and experience the sensation of touch through it. (Photo by Michael Henninger/Post-Gazette)President Barack Obama shakes hands and fist bumps with a robotic arm controlled by the mind of Nathan Copeland, at right, in the exhibition hall of The White House Frontiers Conference at the University of Pittsburgh on Thursday, Oct. 13, 2016. Copeland is a quadriplegic with a brain implant that can allow him to control the remote arm and experience the sensation of touch through it. (Photo by Michael Henninger/Post-Gazette)President Barack Obama shakes hands and fist bumps with a robotic arm controlled by the mind of Nathan Copeland, at right, in the exhibition hall of The White House Frontiers Conference at the University of Pittsburgh on Thursday, Oct. 13, 2016. Copeland is a quadriplegic with a brain implant that can allow him to control the remote arm and experience the sensation of touch through it. (Photo by Michael Henninger/Post-Gazette)NASA Astronaut Dr. Serena Aunon-Chancellor, left, and Boeing representative Daniel Nelson, right, guide President Barack Obama as he tries out a spacecraft flight and docking simulator inside the exhibition hall at the University of PIttsburgh for The White House Frontiers Conference on Thursday, Oct. 13, 2016. (Photo by Michael Henninger/Post-Gazette)A spotter keeps watch from a roof at Carnegie Mellon University during The White House Frontiers Conference on Thursday, Oct. 13, 2016. (Photo by Michael Henninger/Post-Gazette)President Barack Obama is given a tour of the SpaceX Dragon Spacecraft at Carnegie Mellon University during his visit for The White House Frontiers Conference on Thursday, Oct. 13, 2016. (Photo by Michael Henninger/Post-Gazette)President Barack Obama is given a tour of the SpaceX Dragon Spacecraft at Carnegie Mellon University during his visit for The White House Frontiers Conference. (Photo by Michael Henninger/Post-Gazette)President Barack Obama speaks at The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)President Barack Obama speaks at The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)President Barack Obama speaks at The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)Kafui Dzirasa, MD, Ph.D., right, laughs while speaking next to President Barack Obama during a panel discussion at The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)President Barack Obama listens to his fellow speakers while sitting on a panel during The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)A Secret Service agent watches from backstage as President Barack Obama speaks at The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)President Barack Obama picks up Rowan Wright, 10 and a half months, the son of Forest Wright, while greeting attendees at The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)President Barack Obama picks up Rowan Wright, 10 and a half months, the son of Forest Wright, while greeting attendees at The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)President Barack Obama greets attendees at The White House Frontiers Conference at Carnegie Mellon University. (Photo by Michael Henninger/Post-Gazette)Secret Service agents stand on the tarmac as Air Force One prepares to depart the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)Air Force One prepares to depart the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)Spotters keep watch as Air Force One prepares to depart the 171st Air Refueling Wing in Coraopolis. (Photo by Michael Henninger/Post-Gazette)
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