Short answers, pulled from the story.
George F. Kennan arrived in the world on the 16th of February 1904 within a household in Milwaukee, Wisconsin. He grew up believing his mother Florence James had passed away during childbirth after she died of peritonitis caused by a ruptured appendix two months after his birth.
The Long Telegram became commonly known as a document outlining a new strategy for diplomatic relations with the Soviet Union to Secretary of State James Byrnes. This lengthy telegram sent from Moscow on the 22nd of February 1946 argued that Soviet behavior depended mainly on the internal necessities of Joseph Stalin's regime.
Soviet authorities declared George F. Kennan persona non grata and refused to allow him to re-enter the USSR after he made a statement at a press conference comparing his conditions to those encountered while interned in Berlin during hostilities between the United States and Germany. This incident marked a turning point in his career away from direct government service.
George F. Kennan testified before the Senate Foreign Relations Committee in February 1966 stating that preoccupation with Vietnam was undermining U.S. global leadership. He compared the Johnson administration's policy towards Vietnam as being like that of an elephant frightened by a mouse.
George F. Kennan described NATO enlargement as a strategic blunder of potentially epic proportions during a 1998 interview with The New York Times. He warned that attacking Iraq would amount to waging a second war bearing no relation to the first war against terrorism.