" Under the doctrine of “plausible deniability” favored by Allen Dulles, the president was sometimes not told things it might be inconvenient or embarrassing for him to know—assassination plots against foreign politicians, for instance. But in this case, plausible deniability for the president would not have been required, for the United States was not doing anything dubious. It looks instead as though crucial intelligence about the activities of key allies was withheld from the president during an international crisis. "

― Alex von Tunzelmann , Blood and Sand: Suez, Hungary, and Eisenhower's Campaign for Peace