UP 4141, the George Bush Library locomotive leads a UP manifest south towards Bryan/College Station and Houston while crossing State Highway 6 on the former SP.
KCSM 3498 slows to a stop at the US inspection point on the Laredo International Bridge. The Mexico crew will swap paperwork with the US crew after inspection and then walk back across the bridge.
The H-DENBEL, with three GE locomotives in the same paint job belching out a bit of black smoke, crosses over a small creek just to the north of Cactus.