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.

A pickup truck and a tour van collided on a highway leading to Yellowstone National Park, leaving seven people dead and eight others injured, Idaho State Police said.