Among those at Boston's festivities was Carlos Arredondo, the cowboy hat-wearing marathon attendee who became part of one of the indelible images of the bombings' aftermath: helping rush a badly wounded man from the scene in a wheelchair, his legs torn to pieces.
Arredondo said the July 4 celebration — an event authorities believe the bombing suspects initially planned to target — is an important milestone in the healing process, not just for him but also those who were stopping to tell him their own stories of that day.
"I think there's no better place to be," said Arredondo, wearing his cowboy hat and a "Boston Strong" shirt in the marathon's blue and yellow colors.
Kathy Concileo had staked out a nice spot for the evening's concert, near center stage. The Norwell, Mass., woman said she was surprised at the turnout.
"As much as they say we've healed and moved on, I think this shows that people are still afraid to come out in a crowd," she said.
Not everyone was welcoming the masses — Hermosa Beach, Calif., was ramping up police patrols after years of drunken and raucous behavior from revelers. Hartford, Conn., postponed fireworks because the Connecticut River was too high.
Nationwide, anti-surveillance protests cropped up in a number of cities on Independence Day with activists speaking out against recent disclosures that the National Security Agency has been secretly logging people's phone calls and Internet activity. In Philadelphia, more than 100 people marched downtown to voice their displeasure, chanting, "NSA, go away!"
But in Union Beach, N.J., which was destroyed by Sandy, residents had something to celebrate. The working-class town won a party and fireworks contest from the television station Destination America and USA Weekend magazine.