Possible Clues:

• Agcy. that regulates explosives
• Justice div. that conducts raids
• Fed. agency at Waco
• Bureau that added "Explosives" to its name in 2002: abbr.
• The NRA once called its agents 'jack-booted thugs'
• Org. Wayne LaPierre called 'jack-booted thugs'
• Crime-busting org.
• Arm of the Dept. of Justice
• Brady Bill enforcement org.
• 'Thank You for Smoking' org