Police Commissioner William Evans was planning to run in the Boston Marathon but decided he needed to work instead.

Evans has run 49 marathons and he wanted to make Boston the 50th. But after the Brussels bombings, he knew that things weren’t quite settled down enough for him to take the day off on Patriots’ Day. He says, "Unfortunately, it’s still a crazy world out there."

Evans was at the finish line on Monday morning checking things out. He says security will be just as tight as it has in the two years since the attacks on Boylston Street in 2013. This year, the course will have added measures in the form of more surveillance cameras and anti-drone technology.

Evans says he’ll run his 50th marathon in Maine next month.

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