Sebastian Vettel: "Ferrari looked quick this morning and McLaren could be a surprise here, and Lotus and Mercedes will be strong as normal."
Pastor Maldonado: "It was a difficult session today, particularly trying to get the most out of the tyres."
The Mercedes drivers completed a total of 118 laps today, more than a full race distance each.
Sebastian Vettel set a best time of 1m 37.305 on the medium compound tyre to finish 0.115s ahead of his Australian team mate Mark Webber on 1m37.420s.
The popular web-mapping technology allows Internet users to see the world-class sports and entertainment venue from inside the 3.4-mile racing circuit.
Sergio Perez will be hoping to build on his consecutive points finishes in India and Abu Dhabi, while Jenson Button will be looking to score points for the 13th time this year.
Salo believes that Lotus needs an experience driver for the final two races.
Formula One received an absolutely fantastic welcome from the American public last year, which made it a truly memorable race.
Paul Di Resta looks forward to visiting Austin. and Adrian Sutil prepares for his first experience of the Circuit of The Americas.
Here’s what some of drivers had to say about last year’s inaugural race, the city of Austin, and about heading back to Texas for this year’s F1 USGP.
Pirelli and McLaren will have to find another track to test the new-generation tyres.