Historical clue formulations

• "The birds and the bees" and others — 2023-03-26
• Part of SALT — 2014-12-19
• Diplomatic efforts — 2012-01-08
• See 29-Across — 2011-12-15
• Is successfully interrogated — 2010-04-24
• Squeals — 2007-07-20
• Spills the beans — 2002-05-21
• Diplomatic doings — 1999-06-11
• Squeals — 1998-07-02
• Summits — 1997-09-28
• Negotiations — 1994-06-29