Historical clue formulations

• Where bombs are bursting, per Francis Scott Key — 2015-01-04
• Where there are "bombs bursting," to an anthem singer — 2012-02-15
• Where Francis Scott Key saw bombs bursting — 2011-07-27
• Where Key's bombs burst — 2009-11-22
• Where to see "bombs bursting" — 2008-10-02
• Where Francis Scott Key saw bombs bursting — 2007-05-24
• "...bombs bursting ___" — 1998-09-21
• Where bombs burst, so we sing — 1994-04-03
• "...bombs bursting _____" — 1993-11-25