A 1966 treaty entitled which nation bordering China to Soviet military help if invaded?

A 1965 student film evolved into which director's first feature, 1971's "THX 1138"? A 1965 U.S. pilot of England's "Steptoe and Son" was recast and sold as which 1972 comedy show? A 1966 book was titled "___ Teaches Chess", with which player's name? A 1966 gold coin from Kenya has "Father of the Kenya Nation" on one side and whose portrait on the other? A 1967 accident aboard the USS Forrestal, one of which kind of ship, caused a tragic fire? A 1967 Jimi Hendrix single was titled "The Wind Cries" whom? A 1967 law kept English as an official language in India until all states would accept which language? The severe Sahel droughts beginning in the late 1960s pushed which desert southward?