The US military has pledged that it will take steps to avoid "internal threats", in the Pentagon's final report on the Fort Hood shootings.
Maj Nidal Hasan has been charged with murdering 13 of his colleagues and attempting to murder 32 others at the army base in Texas last November.
The report recommends giving commanders access to soldiers' records and upping emergency response capabilities.
An earlier report said several officers did not properly supervise Maj Hasan.
A military court is to decide in October if the case against the psychiatrist will proceed to trial. He faces a possible death sentence if convicted.
"These initiatives will significantly improve the Department's ability to mitigate internal threats, ensure force protection, enable emergency response, and provide care for victims and families," Defence Secretary Robert Gates wrote in the introduction to the report published on Friday.
He said "every effort to safeguard civil liberties" would be made in carrying out the report's recommendations. BBC News
