Historical clue formulations

• Keep an ___ (watch) — 2013-05-09
• Keep an ___ — 2011-06-21
• "I've got my ___ you!" — 2010-03-17
• "Keep your ___ the prize" — 2009-11-02
• Keep an ___ (watch) — 2008-06-02
• "Keep your ___ the ball" — 2006-09-27
• Keep an ___ (watch) — 2005-10-11
• Keep an ___ — 2002-10-13
• Keep an ___ — 2000-03-10
• CBS News's "___ America" — 1999-07-25