The deaths of six, and possibly seven, foreign nationals in a fiery van crash in eastern Idaho are a reminder that many visitors to two of the busiest U.S. national parks, Yellowstone and Grand Teton,

Seven people were killed in a collision between a van and a pickup truck on an Idaho highway near Yellowstone National Park, officials said.

The driver of a Dodge Ram pickup and six people inside a Mercedes passenger van died. The van was carrying a tour group of 14 people.