the Defense POW/MIA Accounting Agency, is working to recover the remains of airmen lost during World War II.

Germany is one of 45 nations where the agency is searching for missing U.S. service members from past conflicts. 

There are still over 81,000 personnel missing in action, so the agency's work will continue into the foreseeable future.

How the POW /MIA do the job, process the excavation sites, etc, is in a very informative article at https://www.defense.gov/News/News-Stories/Article/Article/3526030/dod-seeks-to-bring-home-wwii-bomber-crew-lost-over-germany/