president barack obama views science exhibits during the 2015 white house science fair celebrating student winners of a broad range of science technology engineering and math stem competitions in the red room march 23 2015 the president talks with emily bergenroth alicia cutter karissa cheng addy oneal and emery dodson all six year old girl scouts from tulsa oklahoma they used lego pieces and designed a battery powered page turner to help people who are paralyzed or have arthritis official white house photo by chuck kennedy this official white house photograph is being mad 2gk8d0y.jpg from 杜伊斯堡 埃森大学 science and technology diploma☀️网址：zjw211 com☀️ View Photo