Valtteri Bottas was quickest at the end of the Eifel Grand Prixโ€™s single hour of practice ahead of qualifying later today.

Running at the Nurburgring was abandoned on Friday due to heavy fog, and through temperatures remained low on Saturday morning, clear skies allowed teams and drivers to make the most of their limited track time before Q1.

With the track temperature starting at just 60 degrees F and the air chilled to 45, early running featured lockups aplenty as drivers acclimatized to the low-grip conditions.

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Bad weather has forced the cancellation of second practice at the Eifel Grand Prix.

Thick fog shrouded the Nurburgring and surrounding areas on Friday afternoon, preventing the medical helicopter from flying between the circuit and the designated hospital approximately 35 miles away.

With no suitable medical facility within a 20-minute drive, the sport requires the availability of the air ambulance in the event of a crash occasioning serious injury.

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First practice for the Eifel Grand Prix was called off after heavy fog at the Nurburgring grounded the medical helicopter.

No Formula 1 session can run without rapid access to hospital care on safety grounds. The designated facility in Koblenz, some 35 miles from the circuit, was rendered unreachable by air in the low-lying cloud, forcing race control to cancel the session.

โ€œIt is a bit challenging,โ€ FIA race director Michael Masi told F1 TV. โ€œWith the fog that has come in, the medical helicopter is not able to take off and fly to the hospital. The distance by road is far too far should something occur.

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An interview with Rubens Barrichello