HELENA, Mont. (AP) — Students and gun-control advocates in Montana and Wyoming joined protesters who rallied across the nation Saturday, galvanized by the students-turned-advocates who survived last month's Florida school shooting.

At least nine March for Our Lives rallies and marches were planned across the two states, most of them organized and led by high-school students after the Feb. 14 attack at Marjory Stoneman Douglas High School in Parkland left 17 people dead.

At the rally in Helena, Montana, two teen sisters who helped organize the protest said the Parkland shooting survivors gave t...