Fleet of hydrogen passenger trains debuts in Germany

A fleet of hydrogen-powered passenger trains is replacing diesel trains that previously operated on nonelectrified tracks in Germany. The trains use hydrogen fuel cells to generate electricity, saving about 420,000 gallons of diesel fuel a year.

Apple security update: Install iPhone, iPad, Mac patches now

Apple detected serious security vulnerabilities for iPhones, iPads and Macs that could potentially allow attackers to take complete control of these devices. Security experts say everyone should update any Apple device they have immediately.