It is now 20 years since Formula One last suffered a fatality during a race when Ayrton Senna died in a crash at the San Marino Grand Prix but four-time world champion Sebastian Vettel says the inherent danger in the sport cannot be underestimated.
"Formula One is safer today but it is still not completely safe because there is still so much that can happen," Vettel said.
Despite the increase in safety measures implemented since the death of Senna on May 1, 1994 - and Roland Ratzenberger, who died a day earlier in qualifying at the same Grand Prix - Vettel warned: "you must never feel too safe."
Drivers now have head and neck protection, a development which some feel could have saved Ratzenberger 20 years ago.
"Unfortunately it always took accidents and negative events for us to learn the most," said Vettel.