SportsWatch: Taking a 180mph spin around America's birthday Grand Prix track
BBC correspondent Helena Humphrey test-drives the circuit ahead of the Freedom 250 Grand Prix in Washington DC. IndyCar racers are expected to reach 180mph, with the event forming part of the US 250th anniversary celebrations and drawing about 140,000 people per day. It is the capital's first major auto race in more than 24 years.
Watch: Taking a 180mph spin around America's birthday Grand Prix track
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