Naval Special Warfare Unit Four / NSWU-4 Homestead Florida SEAL Navy Challenge Coin Defense Contractor 4 3/8 inch (approx) Army

4 3/8 inch (approx) Army Air Corps Patch

– Delta - The Army's 75th Ranger Regiment: Regimental Reconnaissance Company

Delta Force and DEVGRU are the military's primary counter-terrorism units

it is the service cryptologic component (SCC) responsible to the National Security Agency and Central Security Service for Air Force cryptographic activities

Scandal and Trial information from Wikipedia:

Naval Special Warfare Unit Four / NSWU-4 Homestead Florida SEAL Navy Challenge Coin Defense Contractor 4 3/8 inch (approx) ArmyThis coin is 1 3 4 inches in diameter. Naval Special Warfare Unit 4, was a geographical located SEAL unit stationed with the US Southern Command left Roosevelt Roads, Puerto Rico in 2003. Re activated in 2016 in Homestead, Florida.