Historical clue formulations

• Contents of a drug shipment — 2024-03-29
• 1,000 in a metric ton — 2018-10-03
• Drug bust units — 2017-11-13
• Weights of some contraband — 2014-03-10
• They're not as heavy as stones — 2011-11-17
• Bust finds — 2011-01-14
• British "pounds" — 2009-09-18
• Drug units — 2009-07-14
• Weights abroad, informally — 2008-01-14
• Converted pounds — 2001-10-13
• They may be involved in busts — 2000-09-17
• Bust finds — 1994-09-21