Six terrorists who carried out attacks were on the FBI's radar previously. The Justice Department's internal government watchdog released a report Wednesday identifying what it described as significant issues with how the FBI handled investigations of extremists based in the U.S. who either sought or successfully carried out attacks against Americans. The report from DOJ Inspector General Michael Horowitz scrutinized how agents investigated so-called 'homegrown violent extremists,' or HVE, and found several instances where individuals who went on to carry out attacks had been previously identified by the FBI but had their cases closed with no further action. "Since September...