A pickup truck that collided with a tour van near Yellowstone National Park last week, killing seven people, crossed the highway's center line and hit the van, according to Idaho State Police. Investigating troopers have determined that the Dodge Ram pickup crossed the line on U.S. Highway 20 and struck the Mercedes passenger van, Police said in a Tuesday statement. There was a group of twelve Chinese tourists and an Italian tourist on board the van, in addition to the driver.