The day began with a somber tribute at the Eternal Flame over President John F. Kennedy's gravesite.<br/> <br />His sister, Ambassador Jean Kennedy Smith, paused to honor the former president who was assassinated 50 years ago.<br/> <br />Visitors filed past his final resting place throughout the day.<br/> <br />All across Washington D.C., flags were lowered to half-staff in remembrance of the 50th anniversary.<br/> <br />In Dallas, thousands braved the bitter cold and rain to attend the city's first official ceremony to mark Kennedy's assassination.<br/> <br />SOUNDBITE: MIKE VANARSDEO, ATTENDEE, SAYING:<br/> <br />"I was nine years old at the time this happened and 50 years later I am able to be here and reminisce the whole thing all over again."<br/> <br />The sound of bagpipes echoed through the streets as the ceremony began.<br/> <br />There were songs, prayers, and speeches to commemorate the day.<br/> <br />SOUNDBITE: MARK HAMMER, ATTENDEE, SAYING:<br/> <br />"I remember like it was yesterday. I was in seventh grad and just a vi
