Samantha Garvey, 18, of Long Island, New York, waits to show U.S. President Barack Obama her science project during the second White House Science Fair in Washington February 7, 2012. The teenager and her family were living in a homeless shelter when she was named a semi-finalist in the Intel Science Search.
REUTERS/Kevin Lamarque (UNITED STATES – Tags: SCIENCE TECHNOLOGY SOCIETY EDUCATION)