Presidential helicopter (South Korea)

The South Korean Presidential Helicopter is the Republic of Korea Air Force helicopter used to transport the President of South Korea. The current aircraft tail number is 05050. 
Three highly modified military versions of the Sikorsky S-92 helicopter are currently used as the Presidential helicopters. The aircraft are configured to carry 22 passengers and two crew members. 
The helicopter has a vast array of offensive and defensive safety measures mostly Classified to keep the President safe.
Acquirement.
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 and are stationed at Seoul Air Base. 
Security.
Very little is known about the security of the helicopters with most information being highly classified but of what is publicly known. The aircraft have infrared vision, Missile defense systems, secure communication lines, flares to deflect against heat-seeking missiles and a radar warning system.
Current operations.
The Presidential Helicopter is sometimes the preferred alternative to motorcades, which can be expensive and logistically difficult. The controlled environment of a helicopter is also felt to add a safety factor. The fleet is also used to transport senior Cabinet staff and foreign dignitaries and first family members.
As a security measure, The Presidential Helicopter always flies in a group of three identical helicopters. One helicopter carries the President, while the others serve as decoys. Upon take-off these helicopters shift in formation to obscure the location of the President.
The Presidential Helicopter has a lot of Classified technology onboard but of what is known to the public, The helicopters all have the following equipment onboar: secure communications equipment, a missile defense system, infrared technology, and a radar warning system. 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.