U.S. President Obama holds up a t-shirt at the Massachusetts Institute of Technology in Cambridge

 
U.S. President Obama holds up a t-shirt at the Massachusetts Institute of Technology in Cambridge
U.S. President Barack Obama holds up a t-shirt given to him by Mechanical Engineering Professor Alex Slocum (L) as Susan Hockfield, President of the Massachusetts Institute of Technology (MIT), takes him on a tour of the institution's research labs in Cambridge, Massachusetts, October 23, 2009. REUTERS/Jason Reed (UNITED STATES POLITICS EDUCATION IMAGES OF THE DAY)