From an article about Korean War soldiers missing in action:
Perry said scientists have discovered that the shape of a clavicle is unique, much like a fingerprint. Before U.S. soldiers were sent to Korea, they had their chests X-rayed to check for tuberculosis. Military officials are putting the chest X-rays of missing soldiers into a database.
Perry said scientists are working on a way to match those X-rays with the unidentified remains as an alternative to DNA analysis.
He said it is early in the process and scientists haven’t perfected the method.
That sounds wonderful and I hope this gets somewhere. DNA testing is expensive and time-consuming and, as the article notes, not always practicable. The more ways there are to identify human remains, the better.