Red Bull show car to be demonstrated by Vettel and Ricciardo.
Circuit of the Americas adds rocker for November 2 race.
Alexander Rossi, Caterham F1 Team Reserve Driver and Caterham Racing GP2 race driver, will drive in two FP1 sessions this season at the Canadian and US Grands Prix.
Three races was always the F1 chief executive's plan.
In early November, Central Texas hotels are wide open, and it’s beautiful time of year to visit Austin.
"I don't understand how I could make so many mistakes," said Kovalainen.
Pirelli wants to know what they should do.
Adrian Sutil will line up in P17 after a technical issue hampered his chances.
Pastor Maldonado's qualifying was hindered by traffic in Q1 which meant that he just missed out on Q2.
It was the 44th pole of the newly-crowned champion’s career and his eighth of the season.
The Spaniard is in sixth place on the grid, starting alongside the Mercedes of Lewis Hamilton.
Sergio Perez: “I’ll be really hoping to put on a great show for all my Mexican fans”
Daniel Ricciardo: "Now I’m looking forward to the race: I’m just outside the top ten, I’m on the clean side of the track and I get a free tyre choice.”
This afternoon saw Lewis Hamilton and Nico Rosberg qualify in fifth and 14th places respectively for the United States Grand Prix.
Sebastian Vettel now has 44 career Formula One pole positions.
‘Text-To-Give’ program supports American Red Cross relief efforts
The E21 demonstrated strong potential using both tyre compounds. Heikki was quickly up to speed.
Dr Vijay Mallya: "The engineers have lots of data to analyse tonight to make sure we get the most from the tyres in qualifying and the race.”
The quickest driver of the day was Red Bull’s Sebastian Vettel, who set a time of 1m37.305s on the medium compound tyres halfway through FP2.
Nico Hulkenberg: "The car was ok and the performance is looking good too."
Daniil Kvyat: "...we still did 20 laps which is important mileage for me and we also managed to do some aero measurements."
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."