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The Latest: NATO meets in meeting requested by Turkey in response to Islamic State threat

  • A US Air Force transport plane maneuvers on the runway at Incirlik Air Base, in the outskirts of the city of Adana, southeastern Turkey, Tuesday, July 28, 2015. After months of reluctance, Turkish warplanes started striking militant targets in Syria last week, and also allowed the U.S. to launch its own strikes from Turkey's strategically located Incirlik Air Base. (AP Photo/Emrah Gurel)

    A US Air Force transport plane maneuvers on the runway at Incirlik Air Base, in the outskirts of the city of Adana, southeastern Turkey, Tuesday, July 28, 2015. After months of reluctance, Turkish warplanes started striking militant targets in Syria last week, and also allowed the U.S. to launch its own strikes from Turkey's strategically located Incirlik Air Base. (AP Photo/Emrah Gurel)  (The Associated Press)

  • NATO Secretary General Jens Stoltenberg addresses the media after a North Atlantic Council Meeting at NATO headquarters in Brussels on Tuesday July 28, 2015.  For just the fifth time in its 66-year history, NATO ambassadors met in emergency session Tuesday to gauge the threat the Islamic State extremist group poses to Turkey, and the debated actions Turkish authorities are taking in response. (AP Photo/Geert Vanden Wijngaert)

    NATO Secretary General Jens Stoltenberg addresses the media after a North Atlantic Council Meeting at NATO headquarters in Brussels on Tuesday July 28, 2015. For just the fifth time in its 66-year history, NATO ambassadors met in emergency session Tuesday to gauge the threat the Islamic State extremist group poses to Turkey, and the debated actions Turkish authorities are taking in response. (AP Photo/Geert Vanden Wijngaert)  (The Associated Press)

  • NATO Secretary General Jens Stoltenberg addresses the media after a North Atlantic Council Meeting at NATO headquarters in Brussels on Tuesday July 28, 2015.  For just the fifth time in its 66-year history, NATO ambassadors met in emergency session Tuesday to gauge the threat the Islamic State extremist group poses to Turkey, and the debated actions Turkish authorities are taking in response. (AP Photo/Geert Vanden Wijngaert)

    NATO Secretary General Jens Stoltenberg addresses the media after a North Atlantic Council Meeting at NATO headquarters in Brussels on Tuesday July 28, 2015. For just the fifth time in its 66-year history, NATO ambassadors met in emergency session Tuesday to gauge the threat the Islamic State extremist group poses to Turkey, and the debated actions Turkish authorities are taking in response. (AP Photo/Geert Vanden Wijngaert)  (The Associated Press)

NATO ambassadors are gathering for an emergency session to gauge the threat the Islamic State extremist group poses to Turkey, and the actions Turkish authorities are taking in response.

The extraordinary meeting Tuesday at NATO headquarters is only the fifth such emergency meeting in the 66-year-history of the alliance. Turkey requested the session under Article 4 of the treaty, which empowers its 28 member states to seek such consultations when they consider their "territorial integrity, political independence or security" to be in jeopardy.

Turkey's request followed an IS suicide bombing near Turkey's border with Syria that left 32 people dead and an IS attack on Turkish forces, which killed a soldier.