Lissner was, in fact, the first American journalist to call attention to the seriousness of the Communist penetration of Guatemala.

After the success of the Marshall Plan, there could no longer be any question of dangerous Communist penetration in that region.

Internal security became the phrase to define the defense against Communist penetration.

Its lavish resources and geographical location are not essential for Western security; the myth of Communist penetration into the African heartland finally has been laid to rest.

Here was Casey's chance to attain his dream: to reestablish C.I.A. influence in Iran, scene of the Agency's greatest early triumph, and to reverse the Communist penetration of Central America.

His boss had made investigation of Communist penetration in government a dead letter by continuing Truman's gag rule.

Katanga then came to be seen as the main source of division and chaos, and therefore as facilitating, if not encouraging, Communist penetration.

What begins in justifiable enthusiasm for a good end (stopping Communist penetration of this hemisphere is a good end) can easily overlook the need to proceed by ponderously lawful means.

To many, Mr. Hiss was a traitor whose case proved beyond doubt the existence of Communist penetration of the Government.

In 1950, he headed a committee, generally known as the Tydings Committee, to investigate Joseph McCarthy's early claims of Communist penetration of the federal government and military.