Julie Byard, head of a Detroit nursery, tells children stories and sings them songs prior to their afternoon nap in 1942. AP hide caption

itoggle caption AP

President Obama delivers his State of the Union address to a joint session of Congress on Jan. 20. Vice President Joe Biden and House Speaker John Boehner of Ohio listen in the background. Mandel Ngan/AP hide caption

itoggle caption Mandel Ngan/AP

Alan Gross (center), recently freed after being held in Cuba, speaks with NASA astronaut Scott Kelly before the start of the State of the Union speech in the House chamber of the U.S. Capitol. At left is Judy Gross. Rob Carr/Getty Images hide caption

itoggle caption Rob Carr/Getty Images

President Obama receives a standing ovation as he prepares to deliver his State of the Union address to a joint session of the U.S. Congress on Capitol Hill Tuesday. Jonathan Ernst/Reuters/Landov hide caption

itoggle caption Jonathan Ernst/Reuters/Landov