Health officials were at the San Salvador airport as we arrived, using a thermal imaging machine which supposedly would tell them if arriving passengers had a fever (swine flu). Here they are watching us after we had passed through the screening. I don't know if the guy not wearing a mask is just not concerned about catching the flu or if he realized that the ONE mask they are issued each day becomes contaminated after about an hour. All other officials were wearing masks--security guards, immigration officers, and customs officials--even luggage cart attendants.