US President Barack Obama  boards Air Force One at Andrews Air Force Base in Maryland on October 23, 2009 en route to Boston, Massachusetts, where he will tour a research laboratory at the Massachusetts Institute of Technology an institution that has been developing cutting edge clean energy technology. Getty Images logo Getty Images 28 months ago

US President Barack Obama boards Air Force One at Andrews Air Force Base in Maryland on October 23, 2009 en route to Boston, Massachusetts, where he will tour a research laboratory at the Massachusetts Institute of Technology an institution that has been developing cutting edge clean energy technology.