Seated left to right are, US Air Force (USAF) First Lieutenant (1LT) William Lujan, USAF Captain (CAPT) Tom Kibilstis, US Navy (USN) CHIEF PETTY Officer (CPO) Major Warren and USAF Technical Sergeant (TSGT) Alwayne Perry, discussing public health issues with a Republic of Korea (ROK) Navy crew who's vessel docked after spending several days in Singapore