text:  A truck driver was killed after his 18-wheeler veered off an expressway and slammed into two cars before crashing into a home Saturday morning in Mission, Texas. The driver of one of the other cars has been hospitalized with non-life-threatening injuries. And fortunately, that home that was hit is up for sale and was unoccupied. The July 4th holiday is on track to be one of the busiest in history with more than 70 million people expected to travel. You're listening to ABC News.