TASK DEFINITION: Given a text, write a compressed version of it in a single sentence.
PROBLEM: In addition, the 911 system struggled with the volume of calls and rigid standard operating procedures according to which calls conveying crucial information had to wait to be transferred to either EMS or FDNY dispatch.

SOLUTION: In addition, the 911 system struggled with the volume of calls and rigid standard operatins procedures according to whichi calls conveying crucial information.

PROBLEM: Other officers began performing rescue and evacuation operations on the ground floors and in the PATH (Port Authority Trans-Hudson) station below the WTC complex.

SOLUTION: Other officers began operations on the ground floors and in the PATH station below the WTC complex.

PROBLEM: Many of those exploited in the workplace are undocumented residents who believe they have no rights, while others are threatened with termination if they complain, she said.

SOLUTION:
Many of those exploited are undocumented residents who believe they have no rights or are threatened if they complain.