New York Test Air Raid

The video describes New York City's first air raid practice, where 40,000 wardens guide citizens to shelters. The city, including 5th Ave, comes to a halt as Mayor LaGuardia oversees the operation. The simulation involves clearing streets and stopping public transport, affecting millions. After 24 minutes, the alert ends, and normalcy resumes, demonstrating the city's preparedness.

What was the state of traffic and public transport during the simulated raid?

What was the duration of the afternoon alert and how did it affect the city?