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    Supreme Court finds Twitter not liable for aiding terrorists

    03:32
  • Three Americans held captive abroad released this week

    06:32
  • Why the U.S. is facing extremist violence it doesn't know how to stop

    05:48
  • Republicans pretend right-wing terrorism doesn't exist

    14:37
  • What's behind the rise in America's 'extremist, mass-killing problem'

    05:48
  • Neo-Nazi among 2 charged with plot to ‘completely destroy’ Baltimore

    06:37
  • Right-wing, domestic terror eyed in N.C. infrastructure sabotage as facts remain elusive

    11:53
  • Alpha Kappa Alpha International President on Get Out the Vote Efforts

    04:09
  • Right-wing resists facts about extremist violence to preserve identity of victimhood

    02:26
  • Federal officials warn of 'heightened threat' to election from violent extremists

    01:00
  • 'It's happening at all levels': Toxic politics spreads from school boards to Congress

    03:37
  • Pelosi attack strikes fear among popular targets of right-wing threats

    08:58
  • Three men convicted of aiding plot to kidnap Michigan Governor Whitmer

    02:19
  • As U.S. faces rising domestic attacks, some communities put love first

    15:56
  • Oath Keepers trial, with rare charge and novel defense, focuses on intent

    05:00
  • WH intel: Al-Qaeda has not reestablished itself in Afghanistan

    02:19
  • Political Headlines: Nancy Pelosi in Taiwan, Killing of Al Qaeda leader Ayman al-Zawahri

    06:30
  • Sen. Mark Warner: ‘The world is a safer place’ after killing of Al Qaeda leader Ayman al-Zawahiri

    04:42
  • Liz Sherwood-Randall: ‘Ayman al-Zawahiri is dead’ because of flawless U.S. ‘precision operation’

    06:20
  • 'In the hunt for al-Zawahri, I lost friends; I helped bury them'

    08:58

Protests erupt during Turkish Pres. visit in DC

04:00

President Barack Obama delivered an urgent warning to the Nuclear Summit about the possibility of ISIS terrorists going after nuclear material to build a dirty bomb. Former Senior Advisor at the U.S. State Department Vali Nasr talks to MSNBC’s Andrea Mitchell about the Summit and the protests that erupted during the Turkish President’s visit to D.C.