Boris Yeltsin shelled his own parliament to seize absolute power, but the U.S. spent the following days calculating how to treat the survivor as a partner while debating the expansion of NATO.
For decades, the 'concrete assurances' given to the Soviet Union about NATO's expansion remained a matter of dispute, buried in the personal notes of a diplomat who saw the betrayal coming.
For years, the record of NATO's early expansion effort hid a fundamental contradiction: the private promises made to Moscow and the public push for membership in the East.