A long-awaited report on the Fort Hood shooting faults the FBI for numerous failures in the run-up to the massacre that left 13 dead, concluding that agents' assessment of the gunman, Maj. Nidal Hasan, was "belated, incomplete and rushed" -- and suggesting political correctness played a role in the bureau's decision not to investigate him more thoroughly. 

The report, obtained by Fox News Thursday afternoon, includes 18 specific recommendations for changes at the FBI. However, it does not recommend any disciplinary action against employees at the bureau. 

The report found that the FBI "erred" in several respects -- by failing to interview Hasan when concerns were raised about his contact with known terrorist Anwar al-Awlaki; by failing to search for more email contact between Hasan and Awlaki, and by waiting too long to pursue leads on Hasan. 

The FBI "erred in the process they followed to conclude that Hasan's communications with (Awlaki) were benign and acceptable," the report said.