A dummy is used in a demonstration test of seat-back head restraints at the Insurance Institute for Highway Safety. Brian Naylor/NPR hide caption

itoggle caption Brian Naylor/NPR

In this photo taken circa 1962, U.S. Attorney General Robert Kennedy (from left) talks with his brothers U.S. Sen. Edward Kennedy and President John F. Kennedy. Hulton Archive/Getty Images) hide caption

itoggle caption Hulton Archive/Getty Images)