KANSAS CITY, Kan. (AP) — Anyone who has ever negotiated the line of vehicles at a school drop-off zone knows how frustrating the daily process can be. But police in Kansas City, Kansas, say one mom took matters too far when she used a gun to threaten another mother in a school drop-off line.

The incident happened Tuesday morning at Junction Elementary School, television station KSHB reported. Police say in reports that a mother was dropping off her children in the line when another car sped around hers. As the line was stopped, the mother got out of her car and confronted the other driver — a...