Lewis Hamilton produced yet another incredible display to claim his second straight win in a McLaren one-two at the United States Grand Prix.
Hamilton claimed a second straight win in his US race
The victory, in his first-ever race in Indianapolis, saw the Briton extend his lead over team-mate Fernando Alonso in the title race to 10 points.
Hamilton held off an attempted pass from Alonso on lap 39 but after that the pair did not race each other again.
The Ferraris of Felipe Massa and Kimi Raikkonen took third and fourth place.
Just seven days after claiming a maiden Grand Prix win in Canada, Hamilton delivered another assured drive at the famous Motor Speedway circuit.
"What a dream," said the 21-year-old, after he had climbed onto the podium for the seventh time in his fledgling seven-race Formula One career.
"To come to two circuits (Montreal and Indianapolis) that I didn't know and to really come out with such pace and to see the team moving forward is great.
"The last 15 laps seemed a lifetime, but I was in the lead, I was able to do it and I'm very emotional now."
After taking a second straight pole, Hamilton was able to complete a grid-to-flag victory, coolly dealing with Alonso's two attempts to pass him.
The Spanish world champion tried to hustle pole-sitter Hamilton off the grid but the rookie pulled away and used his now customary early pace to stretch his lead.
After making their first pit-stops just one lap apart, Alonso tried to pass Hamilton, who had become embroiled with the back-markers.
Alonso gathered pace in Hamilton's slipstream and the two McLarens went side-by-side down the main straight, only for Alonso to be thwarted by the Briton as they entered Turn One - after that tussle the McLarens did not race again.
The start was the key, after that who was second would be second in the race
McLaren's build-up to Indy had been dominated by Alonso and Hamilton's publicly sniping about favouritism within the team.
When it came to the crunch team boss Ron Dennis wisely chose to bring both his drivers home safely and preserve the points.
Hamilton added: "It was very tough, Alonso fought very well but at the end I managed to pull a gap which I was able to maintain and control the race."
Alonso, whose glum expression indicated he took little comfort from his best-ever finish in the US, said he had lost the race right at the beginning.
"I think the start was the key point of the race, after that who was second would be second in the race," said Alonso, 25.
"My start was good but we both braked in more or less the same place. I tried to overtake but I didn't want my race to finish in the first corner.
"Eight points are better than nothing, we increased the gap on Ferrari which is one of the main things at this is point in the championship."
Hamilton's win in Indianapolis saw him become only the fourth rookie, alongside Jacques Villeneuve, Nino Farina and Juan Manuel Fangio, to win at least two races in their debut season.
Teenager Vettel got in the history books on his impressive debut
It was also an historic day in Indianapolis for Sebastian Vettel, who became the youngest driver to score a point.
The 19-year-old was making his debut for BMW Sauber as a replacement for Robert Kubica, who is still recovering from the effects of his high-speed crash in Montreal.
Vettel drove smartly and was bumped up into eighth after Nico Rosberg retired on lap 69 as smoke plumed out of his Williams, which was yet again haunted by reliability problems.
There were signs of encouragement for Renault as Heikki Kovalainen, who briefly led a race for the first time in his career, finished fifth ahead of Toyota's tenacious Jarno Trulli.
Mark Webber collected his first points of the season in seventh for Red Bull. There was less luck for Trulli and Webber's respective team-mates.
David Coulthard's Red Bull got shunted by Ralf Schumacher's Toyota out of Turn One on the opening lap, forcing both, along with Honda's Rubens Barrichello, to retire.
Jenson Button brought the other Honda home in 12th while fellow Briton Anthony Davidson was one place better off in his Super Aguri.
Results from the United States Grand Prix, Indianapolis Motor Speedway:
1. Lewis Hamilton (Britain) McLaren 1hr 31min 09.965
2. Fernando Alonso (Spain) McLaren +00:01.518
3. Felipe Massa (Brazil) Ferrari 00:12.842
4. Kimi Raikkonen (Finland) Ferrari 00:15.422
5. Heikki Kovalainen (Finland) Renault 00:41.402
6. Jarno Trulli (Italy) Toyota 01:06.703
7. Mark Webber (Australia) RedBull-Renault 01:07.331
8. Sebastian Vettel (Germany) BMW Sauber 01:07.783
9. Giancarlo Fisichella (Italy) Renault 1 lap
10. Alexander Wurz (Austria) Williams-Toyota 1 lap
11. Anthony Davidson (Britain) Super Aguri-Honda 1 lap
12. Jenson Button (Britain) Honda 1 lap
13. Scott Speed (U.S.) Toro Rosso-Ferrari 2 laps
14. Adrian Sutil (Germany) Spyker-Ferrari 2 laps
15. Christijan Albers (Netherlands) Spyker-Ferrari 3 laps
16. retired Nico Rosberg (Germany) Williams-Toyota 5 laps
17. retired Vitantonio Liuzzi (Italy) Toro Rosso-Ferrari 5 laps
R Nick Heidfeld (Germany) BMW Sauber 18 laps
R Takuma Sato (Japan) Super Aguri-Honda 60 laps
R David Coulthard (Britain) RedBull-Renault 73 laps
R Rubens Barrichello (Brazil) Honda 73 laps
R Ralf Schumacher (Germany) Toyota 73 laps
Fastest lap: Kimi Raikkonen, 1:13.117 on lap 49.
R = retired