U.S. planned to attack Israel in '67
In the 1960s, the U.S. Defense Department drew up operational plans calling for a military confrontation with the Israel Defense Forces to prevent Israel from occupying territory in Egypt and other Arab countries. During the crisis in May-June 1967, on the eve of the Six-Day War, the plan for a military attack against Israel in the event it initiated a war was updated.
The plan involved using air power, paratroopers and Marines to block the advance of IDF armored brigades in Sinai.
See full version of the story in tomorrow's Independence Day issue of Haaretz.