the road systems here in south texas. >> ed, thank you so much. appreciate that from san antonio. with me now, san antonio fire chief charles hood on the phone with me. chief, you know, describe what was seen, best of your understanding when the doors of that tractor trailer were opened upon discovering there were people inside? >> this was absolutely a tragic situation. we had the fire units respond with san antonio pd for a welfare check at the walmart. units arrived found the tractor with folks in the back. very hot, being in an oven if you can imagine. the tractor trailer had no air conditioning. we quickly removed people. we ended up calling a mass casualty situation because we did have 38 victims.