George Kennan's article "The Sources of Soviet Conduct" was attributed to an alias including this letter, which was adopted in 1950 to replace the identifier "Little" by a man who gave the "Message to the Grass Roots" and "The Ballot or the Bullet" speeches before his 1965 assassination by Nation of Islam members.
This designation was given by Walt Rostow to his file containing the Johnson administration's evidence of Nixon's sabotage of the Paris Peace Talks. Thomas Mann's image of a long-dead star "whose light shines most brightly on this world" was used as an analogy to the popularity of the USSR outside Russia itself in a  Foreign Affairs  article informally referred to by this designation that detailed the policy of (*)  containment first outlined in its author's "Long Telegram". George Kennan's article "The Sources of Soviet Conduct" was attributed to an alias including this letter, which was adopted in 1950 to replace the identifier "Little" by a man who gave the "Message to the Grass Roots" and "The Ballot or the Bullet" speeches before his 1965 assassination by Nation of Islam members. For 10 points, give the single-letter surname adopted by black nationalist leader Malcolm.
This designation was given by Walt Rostow to his file containing the Johnson administration's evidence of Nixon's sabotage of the Paris Peace Talks.
X  [accept the  X  file, the  X  envelope, the  X  Article, Mr.  X , or Malcolm  X ; do not accept "the tenth"]