Police tape surrounds the parking lot behind the AME Emanuel Church as FBI forensic experts work the crime scene where nine people where shot by Dylann Storm Roof, 21, in Charleston, S.C. Since the Oklahoma City bombing in 1995, the Southern Poverty Law Center has tracked domestic terrorist plots and attacks in the United States. It lists more than 100, including the slaying of nine black churchgoers during a 2015 prayer meeting in Charleston, S.C. (AP/Stephen B. Morton)

Pressure Mounts Over Trump’s Refusal To Address Right-Wing Terrorist Threats

Since the Oklahoma City bombing in 1995, the Southern Poverty Law Center has tracked domestic terrorist plots and attacks in the United States. It lists more than 100, including the slaying of nine black churchgoers during a 2015 prayer meeting in Charleston, S.C.