Thousands of people have flocked to the spot where President John F. Kennedy was shot for a solemn commemoration of the 50th anniversary of his assassination. Crowds gathered along the same route through Dallas that the president's motorcade passed when shots rang out on November 22, 1963. The event was featured brief remarks by the mayor, the tolling of church bells and readings from the president's speeches by author David McCullough. The flags in Dallas are flying at half mast today as the city holds a memorial service in honor of the 50th anniversary of President Kennedy's assassination.