Writing about a moment that you don't remember is an impossible task, to convey the emotion, to find the words that would absolutely fit the event in question.

For me, and most of my generation, looking back at the 1994 San Marino Grand Prix it is hard to truly fathom the enormity of what happened.

I was a troublesome three-year-old kid without a care in the world and certainly had no indication of the scale of what occurred at Imola that tragic weekend.

As I got older and the story of what happened that afternoon on May 1st 20 years ago continued to be told, there is almost a feeling of guilt that despite being alive, the brain can't recall one of most horrific moments in the history of the sport I love.

What makes it more incredible is when I talk about my first memory of watching F1, I can always recall the incident at Adelaide between Michael Schumacher and Damon Hill that saw the German claim his first world title. It astonishes me that that took place less than six months after what happened at Imola.

The sport lost not one but two drivers that weekend and fans will remember Roland Ratzenberger, who was killed at the Villeneuve turn during the qualifying session, ahead of Sunday's race.

Sadly the Austrian's death is often overshadowed by that of the man who suffered the same fate at the corner just before where Ratzenberger died, Tamburello, just 24 hours later.

It was a man who was the epitome of what a racing driver is all about, ruthless and unforgiving on the track yet one of the most caring and generous people off it.

A man who famously would stop his own car and risk his own life to help another driver who had crashed, and a man who was so much more than just a top sportsman in his home country.

Ayrton Senna's impact in Formula 1 will never diminish and he remains the man most on the current F1 grid look up to as their hero.

It is incredible now to think that the youngest driver in F1 today, Toro Rosso's Daniil Kvyat, was born just six days before Senna smashed into the wall at high-speed on lap seven of the San Marino Grand Prix.

A triple world champion and the man most declare as the greatest driver ever to have got behind the wheel, the affect his sudden death had on F1, and continues to have to this day.

The response to his passing was immediate as makeshift chicanes were installed at some circuits, famously the great Eau Rouge turn was slowed into a tight left, right chicane before major changes were made for the following year.

Improvements in track safety continue to this day with the huge run-off areas at modern circuits and gains in barrier technology, which are particularly prevalent at the sports fastest corners and on its street circuits, were all designed to ensure what happened to Senna cannot happen again.

Imola itself went under the biggest transformation with new chicanes installed at both the Tamburello and Villeneuve turns to reduce speeds.

Modern F1 cars are also safer with more stringent crash tests and the monocoque chassis helped absorb high-energy impacts much more effectively.

The voice of the drivers on the topic of safety was also made louder by the recreation if the GPDA (Grand Prix Drivers Association), an idea Senna himself had had after the death of Ratzenberger on the Saturday.

With the loss of Senna, the sport found its conscience and the need for speed was quickly put second in a bid to ensure no driver suffers the same fate as the great Brazilian.

In this quest there has been success as in F1 at least no driver has died since that fateful afternoon in Italy, nowadays the debate on safety often surrounds the open cockpit as several incidents have seen drivers lucky not to be seriously injured.

Indeed after Felipe Massa's near fatal incident, after being struck in the head by a spring in qualifying at the 2009 Hungarian Grand Prix, research continues as to whether the cockpit should be enclosed.

But the fight for improved safety in every aspect of the sport, from the drivers, to spectators and to the marshals, will always be the biggest F1 faces and that is all because of what happened to Senna and Ratzenberger over a 24-hour period at Imola 20-years-ago.

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