WATCH: Dashcam video captures the terrifying moment a pickup truck blows through a stop sign and slams into a tractor-trailer at a rural Iowa intersection. The

WATCH: Dashcam video captures the terrifying moment a pickup truck blows through a stop sign and slams into a tractor-trailer at a rural Iowa intersection. The violent crash sends debris flying across the roadway. Authorities say the impact also pushed the vehicles into a third vehicle that was sto…