It's the Zeroth Amendment, which comes before all the others and reads in its entirety "When convenient,..."
I especially like the signs outside the 33% of the nation owned by the government, "Abandon all rights ye who enter these gates".
If our government was serious about this Constitution thing, then their property would be miniscule and that would be the one place your RTBA and Freedom of Speech would be absolute. But try speaking your mind in a courhouse or walking in with your sidearm in its proper place.