Military jets and helicopters flew over the city centre until the early hours of Saturday morning as security forces locked down the area around the attacks.
“The security of the alliance is indivisible,” ambassadors from all 28 NATO nations declared in a joint statement after the meeting.
NATO fears intense fighting during summer in eastern Ukraine accusing Moscow of supporting Russian separatist, a charge denied by Moscow.
NATO allies deploy troops, gather arms, schedule military training and upgrade bases in preparation of a possible conflict with Russia and other threats.
Carter called for NATO nations to stand united against an aggressive Russia but insists US is not seeking a conflict with Moscow.
Moscow’s 2014 annexation of Crimea and its meddling in eastern Ukraine have triggered concern in ex-communist eastern and central European states that joined NATO after the Cold War.
The number of Afghan forces killed and wounded in action increased by 63 percent from the start of the year until early May
In Poland, doctors, shopkeepers, lawmakers and others are heeding a call to receive military training in case of an invasion.
Stephen Harper will make clear Canada’s continued commitment to NATO Secretary-General Jens Stoltenberg in Ottawa.
The flurry of high-level diplomacy aimed to end the fighting in eastern Ukraine that is threatening European security.
NATO Secretary-General Jens Stoltenberg said the measures were defensive.
Another 21 people were injured in the incident at the Los Llanos base in southeastern Spain.
International coalition closed its facilities and handed over charge to Afghan military in Dec, 2014.
About 150 French soldiers handed over responsibility to a Turkish unit to operate under the new NATO mission.
It ends with 2,224 American soldiers killed, according to an AP tally, out of a total of some 3,500 foreign troop deaths.