On my way back to Yuma, I switched from concealed carry (open carry of modern handguns is illegal in Texas) to open carry. Just past the New Mexico border, in Arizona, is the San Simon rest stop, at exit 388 on I-10. I have been to this rest stop many times. The Rest Area Guide is old and weatherbeaten. There is no prohibition on the carry of arms, because of open carry activists actions at the Sacaton rest stop in 1998. No one had a problem with me having a pistol in the rest area. A friendly truck driver...