When was NATO created and who was the US during that time?
NATO was created after WW I along with the League of Nations. The U.S. created the League of Nations and did a lot in the process of creating NATO, and i dont fully understand your question "who was the U.S. during that time" but if you are wanting to no the president it was Woodrow Wilson.
The technicality is in the title within your question. The US President is the civilian "commander in Chief" of the US Armed Forces as stated in the US Constitution, however, during NATO supported conflicts, in the past, there has been a military position of Supreme Commander of NATO forces, which reports to the US President and NATO.
It made it in to the war-addicted country it is today. During the cold war a large proportion if the budget went towards the military and technological research, forging the US armed forces into one of the most technologically advanced militaries in the world. During this time the US made DEW, NORAD & NATO
No, exactly the opposite. NATO invoked Article V of the North Atlantic Treaty, which obliges all member states to take what action they deem necessary in response to an attack on one of them. This is the only time in NATO's history that this article has ever been invoked. NATO forces were committed very shortly after the 2001 attacks to Afghanistan as part of that commitment. Many NATO countries still have personnel serving in Afghanistan…
The correct phrasing of this question would be "Was Bill Clinton President during a war?" The answer is yes, and no. Formally, the US was not at war for the period January 1993 - January 2001. However, the US was involved in several NATO and UN conflicts during that time, such as the war in Kosovo (Operation Allied Force), the Somalia / Mogadishu event, and several other miltary operations. http://en.wikipedia.org/wiki/Bill_Clinton#Military_and_foreign_events
No he could not, and in fact, no US president could. NATO is an organization comprised of twenty-eight member countries. One country might decide to withdraw from NATO, but the organization would continue to exist. Thus, even if the US under Mr. Trump left NATO, there would still be many other nations that would continue to participate. As the NATO website says, "NATO’s essential purpose is to safeguard the freedom and security of its members…