- For the first time, runners in the marathon and half marathon will need to pass through security checkpoints to get to the start, and spectators on Sunday must go through security to stand along the Parkway from 20th to 25th streets.

- The checkpoints won't be in place for Saturday's races.

- Here is a map of the checkpoints; note that some are for runners only.

- Race officials are advising runners to arrive by 5 a.m. to allow time to get through the checkpoints.

- Only clear bags are permitted in the secure zone, and runners using gear check must use race-issued clear bags.

- Backpacks, satchels and coolers are not allowed. Diaper bags are permitted.

- Hydration packs, bags and belts, as well as small personal items are allowed, but are subject to search. Sealed plastic water bottles are also permitted.