For the past 100 years in Philadelphia, when a fire breaks out or police are called to an emergency, first responders have been able to count on one thing.
"I can always look to my left, or right, or even behind me, and find 'The Second Alarmers,'" said Philadelphia Police Commissioner Danielle Outlaw. The Philadelphia 2nd Alarmers Association is a group of volunteers who respond with police and fire to offer help.
"On those cold evenings or those hot days, they're always willing to lend a hand and lend a shoulder to lean on," said Philadelphia Mayor Jim Kenney.
They bring everything from food and water to extra batteries.
"When we were first formed, it was just kind of coffee service, just serving coffee. We're not just doing fluids. We're doing equipment, especially with firefighters," said chief Gregory Masi, who has led the volunteers for the past 20 years.