Historical clue formulations

• The Jets and the Sharks, in "West Side Story" — 2019-10-29
• City police concern — 2018-05-05
• Turf war adversaries — 2015-08-19
• High-school disrupters — 2008-10-02
• Targets of some busts — 2008-03-26
• Prison problem — 2006-05-25
• Targets of some busts — 2005-09-09
• Groups of troublemakers — 2003-11-24
• Sides in some wars — 2000-07-28
• The Jets and the Sharks — 2000-04-11
• Sides in a turf war — 1999-07-14
• The Sharks and the Jets, e.g. — 1997-08-05