[Vigilanteman]

It was legal to do so. While you cannot travel internationally with more than $10,000 in cash, there is no such rule for domestic travel.

And, while I don't think it is wise to travel with that much cash precisely because of crooks (including those who work for the government), that still does not justify the seizure.

[Manuel OKelley]

Actually, it’s perfectly legal if you declare it and fill out the form