If you have not seen this story yet, here goes.
A former Secret Service Agent, Monica Emmerson (see her version here at http://www.nowpublic.com/nightmare_at_reagan_national_airport_a_security_story_to_end_all_security_stories )
while traveling at Reagan National Airport DCA, undergoing screening, has banned liquids, not allowed to go through the security checkpoint. A prohibited item. (see TSA Site for these items http://www.tsa.gov/311/index.shtm and http://www.tsa.gov/travelers/airtravel/prohibited/permitted-prohibited-items.shtm
)
She was given her options of what to do with the prohibited item, and after she tries to use her secret service credentials to be allowed to continue with the prohibited item, (since when do former secret service agents keep their law enforcemnt credentials? Or use their federal law enforcement postion to circumvent federal regulations while not on official duties?)
she is escorted out by the TSA to deal with her liquids.
After she leaves the exit lane she dumps the sippy cup contents onto the exit lane floor in view of a MWAA Law enforcement Officer, who confonts her. (see the videos at http://www.tsa.gov/approach/mythbusters/index.shtm )
The MWAA officer makes the lady clean up her mess.
I'm not to go thru w the rest.. read the incident report at TSA (http://www.tsa.gov/approach/mythbusters/index.shtm)

Monica Emmerson, her son, and the sippy cup.