Attempting to Board Aircraft with Concealed Weapon or Explosive Device is the act of trying to get on an aircraft with a hidden weapon or explosive device, usually without the knowledge or consent of the airline. This can be done for a variety of reasons, such as to commit a terrorist act or to hijack the aircraft. There are two main types of attempting to board an aircraft with a concealed weapon or explosive device: 1. Stealth boarding: In this type of attempt, the person tries to board the aircraft without being detected by the airline's security personnel. They may hide the weapon or explosive device inside clothing or luggage or use distraction techniques to avoid detection. 2. Forced boarding: Here, the person attempts to board the aircraft by force, by threatening the security personnel or passengers. This usually involves the use of a weapon or an explosive device, to gain access to the aircraft. The consequences of attempting to board an aircraft with a concealed weapon or explosive device are severe, as the person can face criminal charges and may even be sentenced to a lengthy prison term.