President Barack Obama looks at the project of Peyton Roberston, who won the Discovery 3M Young Scientist competition for his "sandless sand bags" project, during the 2014 White House Science Fair on Tuesday. Image via Aude Guerruccip-Pool/Getty.
President Barack Obama looks at the project of Peyton Roberston, who won the Discovery 3M Young Scientist competition for his "sandless sand bags" project, during the 2014 White House Science Fair on Tuesday. Image via Aude Guerruccip-Pool/Getty.