The release of the report comes as the Defense Department continues to struggle with efforts to curtail sexual assault and harassment across the force.
The U.S. spent $773 million in a four-year span to fly American and coalition forces around Afghanistan. At least part of that was supposed to be reimbursed, but wasn't.
The letter from U.S. Rep. Elaine Luria, a retired Navy surface warfare officer, follows a Navy Times report on planned cuts to the Naval Audit Service.