Historical clue formulations

• "American Pie" singer Don — 2017-06-28
• Washington suburb — 2016-07-24
• "American Pie" songwriter — 2014-10-12
• Virginia locale where the C.I.A. is headquartered — 2008-11-13
• "American Pie" songwriter — 2008-10-12
• Virginia suburb of Washington — 2004-04-02
• "American Pie" singer Don — 1999-08-03
• Singer Don — 1994-01-26