Attendees pay respects during a repatriation ceremony for the presumed remains of U.S. troops who were killed in the Korean War and collected in North Korea, at the Osan Air Base in Pyeongtaek, South Korea, Wednesday, Aug. 1, 2018. North Korea handed over 55 boxes of the remains last week as part of agreements reached during a historic June summit between its leader Kim Jong Un and U.S. President Donald Trump. (Jung Yeon-je/Pool Photo via AP)
U.N. honor guards carry the remains of U.S. servicemen killed in the Korean War and collected in North Korea, onto an aircraft at the Osan Air Base in Pyeongtaek, South Korea, Wednesday, Aug. 1, 2018. North Korea handed over 55 boxes of the remains last week as part of agreements reached during a historic June summit between its leader Kim Jong Un and U.S. President Donald Trump. (Chung Sung-Jun/Pool Photo via AP)
U.N. honor guards carry the remains of U.S. servicemen killed in the Korean War and collected in North Korea, onto an aircraft at the Osan Air Base in Pyeongtaek, South Korea, Wednesday, Aug. 1, 2018. North Korea handed over 55 boxes of the remains last week as part of agreements reached during a historic June summit between its leader Kim Jong Un and U.S. President Donald Trump. (Chung Sung-Jun/Pool Photo via AP)
U.S. troops salute during a repatriation ceremony for the remains of U.S. service members killed in the Korean War and collected in North Korea, at the Osan Air Base in Pyeongtaek, South Korea, Wednesday, Aug. 1, 2018. North Korea handed over 55 boxes of the remains last week as part of agreements reached during a historic June summit between its leader Kim Jong Un and U.S. President Donald Trump. (Jung Yeon-je/Pool Photo via AP)
Dr. Debra P. Zinni, laboratory manager at Defense POW/MIA Accounting Agency, briefs officials on the process of identifying remains of service members during a tour of DPAA facilities at Joint Base Pearl Harbor-Hickam in Hawaii on April 23, 2018. (Sgt. Kelly L. Street/Marine Corps)
Artifacts from the Korean War are displayed at the U.S. Defense POW/MIA Accounting Agency Laboratory at Joint Base Pearl Harbor-Hickam, Hawaii on Tuesday, July 31, 2018. War remains handed over to the U.S. government from North Korea are expected to arrive at the lab Wednesday where scientists will begin the process of trying to match the bones to American soldiers who didn't return from the Korean War. (AP Photo/Caleb Jones)
Artifacts from the Korean War are displayed at the U.S. Defense POW/MIA Accounting Agency Laboratory at Joint Base Pearl Harbor-Hickam, Hawaii on Tuesday, July 31, 2018. War remains handed over to the U.S. government from North Korea are expected to arrive at the lab Wednesday where scientists will begin the process of trying to match the bones to American soldiers who didn't return from the Korean War. (AP Photo/Caleb Jones)