[1] The helicopter has an array of offensive and defensive safety measures which are mostly classified in nature, to keep the president safe.
[2] In 2007 the South Korean Air Force and the Presidential Security Service ordered three highly modified Sikorsky S-92 helicopters to serve as the Presidential Helicopter as part of the VC-X program.
The Presidential Helicopter is sometimes the preferred alternative to motorcades, which can be expensive and logistically difficult.
The fleet is also used to transport senior cabinet staff and foreign dignitaries and first family members.
To add to the security of the helicopter, all members of staff have to go through rigorous background checks and mental health checks before touching any helicopter used for presidential travel or being in the presence of the president at all.