John Kerry of Massachusetts accepted the Democratic presidential nomination before cheering delegates at Boston's FleetCenter.

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The thousands of delegates and journalists are moving smoothly in and out of the FleetCenter each day.

CNN: Convention unfolds under extraordinary security

Mike Flathers, a vendor selling Kerry- Edwards souvenirs inside the FleetCenter, said there was little doubt security was strict.

CNN: Convention unfolds under extraordinary security

Protesters are confined to a fenced area outside the FleetCenter.

CNN: Convention unfolds under extraordinary security

Miles of roads, including part of one interstate, around the convention site have been closed, thousands of security personnel -- many armed -- patrol the site, helicopters hover overhead, checkpoints dot the perimeter of the FleetCenter, and police cars are stationed at the many hotels housing delegates.

CNN: Convention unfolds under extraordinary security