NASCAR is America’s favorite motorsport, but it has been historically resistant to change. With the launch of their Next Gen car, the sanctioning body has moved in a single leap from steel bodied, solid axle 1980s technology to full modern race car technology.Baidu’s Apollo AI business has launched a robotaxi system in Beijing, using factory equipped luxury cars in one of the future venues for the 2022 Winter Olympics. Combined with a larger, integrated traffic control system, Baidu hopes to take the lead in self driving technology.With millions of lines of code in most systems, making websites and databases secure is a major headache for the Pentagon. A new initiative from the Department of Defense aims to use a different approach: pay hackers to attack systems to find weaknesses.Access all episodes of This Week in Engineering on engineering.com TV along with all of our other series.