Formula One has fired up for a new season with Michael Schumacher presenting his new Mercedes, and Ferrari's Felipe Massa back on track six months after suffering life-threatening head injuries.
Schumacher, coming out of retirement at the age of 41 and three years after his last race with Ferrari, had to watch as team-mate Nico Rosberg was given the honour of starting the first test since the 2009 season ended in November.
Completing a hat-trick of comebacks, veteran Spaniard Pedro de la Rosa made his first appearance in three years as a fully-fledged racing driver when he tested the new Sauber.
World champion Jenson Button and Lewis Hamilton get their hands on the sleek-looking new McLaren later this week.
