Obama holds a baby wearing NASA t-shirt at White House Frontiers Conference

Barack Obama might be the most powerful man in the world, but at heart he's just a science nerd - as he proved while touring the White House Frontiers Conference Thursday. The commander-in-geek was clearly in his element as he stepped off Air Force One in Pittburgh and headed to the event, which showcases thrilling innovations in tech. There, a clearly delighted President fist-bumped a paralyzed man who uses a mind-controlled robotic hand, goofed around with a baby in a Nasa T-shirt and got a taste of astronaut life. The President beamed as he took docked a virtual shuttle into the International Space Station on a Boeing Starliner Flight Simulator that had been installed at the event, held in Carnegie Mellon University. 'Your ride is here, baby,' Obama said after docking the simulator on the International Space Station.