MSNBC Live 04/21/14

The same Boston, just stronger

30 Seconds to Know: Mike Barnicle revisits the Boston Marathon one year after the tragedy at last year’s event and talks about Boston’s resilience. In 2013, 29,000 people registered to run. In 2014: 36,000 runners. In 2013, 8500 volunteers supported ... more Duration: {{video.duration.momentjs}}