Nearly 10,000 city workers in Philadelphia who collect trash, answer 911 calls, maintain city pools and perform other jobs went on strike Tuesday after contract negotiations broke down.

Philadelphia International Airport will remain open and operational, officials said. A spokesperson for the airport said workers who are not part of the union will cover DC 33 jobs during the strike.

Employees with AFSCME District Council 33, Philadelphia's largest blue-collar workers union, went on strike at 12:01 a.m. Tuesday morning after union representatives and the city failed to reach a ...