This report must be truly horrific:

The Pentagon again delayed release of a report ranking the risk of sexual assault at more than 200 military installations, comparing the study to unleashing an untested weapon system, according to interviews and documents obtained by USA TODAY.

The release of the study, rescheduled for September, could spark concerns among troops and their families, particularly those stationed at bases where RAND Corp. research determined they face the highest risk of suffering sexual assault.

The report’s rankings will be of particular interest to the tens of thousands of recruits who join the military each year and their families. It could raise questions about what choice, if any, they have in declining assignment to a post with a higher risk of assault and what liability the military has for a recruit assaulted at such a base.

The Pentagon received an updated draft of the study on July 24, four days after USA TODAY reported that Defense Department officials were reluctant to release it. RAND stood by its findings. The only changes being made to it now are to communicate its conclusions better, according to Jeffrey Hiday, a RAND spokesman.

The obvious question:  What are they hiding?