During a threat level 1 on taxi, what is one of the pilot's actions?

During a threat level 1 on taxi, one of the pilot's critical actions is to stop the aircraft when necessary. This response is essential for ensuring the safety of all individuals on board, as well as those on the ground. Stopping the aircraft allows the pilots to assess the situation further, communicate with ground control, and determine the necessary next steps to mitigate any potential threat. By stopping the aircraft, the crew can evaluate for any immediate dangers and coordinate effectively with security authorities if required. This precautionary measure is a vital part of the protocol for maintaining safety during a threat situation.

The other options may not prioritize the immediate safety response required during a potential threat. Simply proceeding without interruptions or continuing at standard speed could expose the aircraft and its occupants to risks. Notifying ground control is an important action but should typically follow the immediate assessment of the situation. Stopping the aircraft establishes a responsible and measured response to an alarming event.