The regs was in a rolling luggage that I was originally going bring on the plane as a carryon, but since that bag was pretty stuffed and heavy, we had a few days before we actually start to dive, and we had 3 flights in total where we had to drag the luggage around (along with our heavy backpack and camera gear), along with the fact the airline that does the international part of my flight allowed multiple baggages to be checked in., I decided this time to check it in.
I don't know how TSA search, maybe when they see something in the xray?
I do bring all my camera gear as a carryon and in Bogota, they were going to confiscate my 15 or so eneloop batteries until we begged them and showed them all the things that need AA batteries (actually, I only had 2 things using AA batteries on hand, but was showing my dslr too).
I did go through international carrier, where when I had my layover in Miami, I saw all these baggage wrapping services where they tightly wrap your luggage in saran wrap. I thought WTF, why such paranoia? I guess stealing things from the luggage still happens.