I recall reading this in Time magazine right after 9/11 and still have the paper copy in my writing files. Kennedy admits that the Soviets had a nuke in their embassy in D.C.
I don't know how real that story really is or how possible such a claim happens to be, but how would you maintain and service such a thing over the years and if this is true, why wouldn't we have done the same thing to the Soviets or any other country? Also makes you wonder if Israel has ever done the same to one of their adversaries.
Interesting food for thought. Good reading:
Were the Russians Hiding a Nuke in D.C.?