Question: How many terrorists were on the second plane to hit the World Trade Center?
Sentence (from "Flight 175: As the World Watched"): It covers the final moments of the passengers and crew on board United Airlines Flight 175, which was the second commercial airliner to strike the World Trade Center, impacted with the South Tower, and was the most visually documented (both photographed and filmed) flight during the September 11 attacks.
Relevant evidence: Yes