NATO has grappled with many perilous issues in its more than six decades of existence. But it's had few times quite like this. That was obvious Thursday, as leaders of the trans-Atlantic alliance's member countries met in Wales. They discussed everything from Afghanistan to the Middle East to Ukraine, each of which has its own special significance and presents its own unique military and diplomatic challenges. "We meet at a crucial time in the history of our alliance," British Prime Minister David Cameron said at the outset of the two-day summit. "The world faces many dangerous and evolving threats, and it is absolutely clear that NATO is as vital to our future as it has been in our past."
@highlight
NATO chief: "Time is short" for a deal on international forces in Afghanistan
@highlight
Ukrainian President: NATO countries have offered "strong, enormous support"
@highlight
British leader says "we don't rule anything out" when it comes to going after ISIS
@highlight
Cameron: Now "a crucial time (for) alliance" due to "many dangerous and evolving threats"
Exactly how is up in the air, in part to a crisis related to @placeholder's recent presidential election.