(BOSTON) -- Security is being tightened for Monday's Boston Marathon, not only because of the bombings in 2013, but also because of the recent Brussels attacks.
About 5,000 police will be available on the streets during the run and according to Boston Police Commissioner William Evans, they're not taking any chances despite there being no credible terror threat.
"It's a real crazy world out there and you know you can never be too safe," he said. "But in the near future, hopefully we slowly but surely get it back to the way it was."
Along with the heavy police presence, police plan to have security checkpoints and multiple surveillance cameras.
More than 30,000 are expected for the 120th running. Some runners are not phased by the increased security, including Heather Beute who is participating this year.
"Safety wise I'm totally calm, I'm very confident in that," she told ABC News. "I'm nervous about the race, but the weather's going to be perfect, and I'm looking forward to qualifying and coming back next year."
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