April 2, 2004 - First meeting of the NATO-Russian Council with 27 members.
August 10, 2004 - NATO Airborne Warning and Control System (AWACS) aircraft begin patrolling Greek airspace prior to the Olympic and Paralympic games. NATO's presence at the Olympics is nicknamed Distinguished Games and includes AWACS and the Multinational Chemical Biological Radiological Nuclear Task Force (MN CBRN TF).
September 14, 2006 - Ukraine announces that it is shelving its aspirations to join NATO, due to opposition by the Ukrainian public and Russia.
November 28-29, 2006 - The 19th NATO summit meeting with heads of state takes place in Riga, Latvia.
April 2-4, 2008 - NATO leaders hold a summit in Bucharest, Romania. Croatia and Albania are invited to join the alliance.
June 17, 2008 - French President Nicolas Sarkozy announces France will soon rejoin NATO's military command, 40 years after it left.
April 3-4, 2009 - The 23rd NATO summit also marks NATO's 60th anniversary. Events are held in Strasbourg, France and Kehl, Germany. During the summit, France rejoins NATO's military command.
August 1, 2009 - Former Danish Prime Minister Anders Fogh Rasmussen takes office as the 12th secretary general of NATO.
November 19, 2010 - NATO adopts the Strategic Concept "Active Engagement, Modern Defence" for the next ten years.
March 24, 2011 - NATO takes command of enforcing a no-fly zone imposed on Libya by the U.N.
March 29, 2011 - Council of Europe rules NATO, among others, responsible for the 63 deaths from among 72 African immigrants left adrift for two weeks while attempting to reach European shores from Libya in March 2011.
May 19, 2012 - Demonstrators take to the streets of Chicago prior to the start of the NATO summit. Anti-NATO protests near Mayor Emanuel's home focus on the cost of the summit to the city and city budget cuts to mental healthcare.
May 20 - 21, 2012 - The 25th Summit is held in Chicago. During the summit, NATO accepts President Barack Obama's timetable to end the war in Afghanistan by 2014.