At an event Thursday, the president unveiled more than $300 million in federal and private money earmarked for supporting science and technology. The total includes $165 million for smart city initiatives, like efforts to reduce traffic congestion.  The one-day conference, dubbed The White House Frontiers Conference, was held in Pittsburgh, a city that has already seen self-driving Uber cars hit its streets and is a leader in health care research. Obama also cited the city, historically linked to the country’s steel industry, as a leader for investing in children’s computer science education. Held jointly with the University of Pittsburgh and Carnegie Mellon, the conference is designed to explore technology and innovation at levels ranging from the personal to the interplanetary. It touched on topics including health care innovation, precision medicine, smart cities, artificial intelligencea nd clean energy.