Bomb threat during flight, what happens in the air and on the ground?

This week, several European flights faced bomb threats, causing disruptions despite no explosives being found. The threats often start with emails warning of explosives on board. Airlines and authorities maintain strict security protocols, but details remain scarce. Pilots follow established procedures when a bomb threat is received, including a checklist for searching the cabin. Depending on the situation, flights may divert to less busy airports. Once on the ground, specialized units inspect the aircraft and passengers. Passengers may not be informed immediately about the situation, leading to confusion during evacuations.