Originally Posted by NVCATS
yea that makes sense... but they didn't ask what we had in the cooler and we didn't offer even when it went through the other luggage area for none conforming luggage.
My understanding is that it is YOUR responsibility to tell them, not their's to ask you for it. Obviously, they cannot ask for any piece of luggage if you happen to have dry ice in it (or any of many other unusual items that may require special handling) so it is up to you to tell them.
Just remember next time. I have traveled with dry ice and it was never a problem.