May 25, 2016 2:20 pm Time Lapse: 37,000 American Flags Placed on Boston Common Time-lapse footage shows the hours-long effort to place 37,000 American flags on Boston Common Wednesday afternoon ahead of Memorial Day Weekend. US & World Videos 1:36 WATCH: Some of the most talked about looks at the Met Gala 3:18 Cup of water leads to OC marathon disqualification 2:14 Kate Beckinsale returns to red carpet after hospitalization for mysterious illness 3:15 NSC reviewing cease-fire proposal: ‘I don't know that it gets any more sensitive than it is right now' 2:23 Climate change is moving Tornado Alley and driving more tornado outbreaks