Security remains tight as 123rd annual Boston Marathon gets underway

Name: Security remains tight as 123rd annual Boston Marathon gets underway
Uploaded: 2019-04-15T15:19:06Z
Duration: 1 min 30 s
Description: An estimated 30,000 runners set off along the 26.2 mile route; Molly Line reports from Boston.

An estimated 30,000 runners set off along the 26.2 mile route; Molly Line reports from Boston.