The Hungarian Grand Prix is a motor race held annually in Hungary. Since 1986, the race has been a round of the FIA Formula One World Championship. A major coup by Bernie Ecclestone, the 1986 Hungarian Grand Prix was the first Formula One race to take place behind the Iron Curtain. Due to the nature of the track, narrow, twisty and often dusty because of under-use, the Hungarian Grand Prix is associated with processional races, with sometimes many cars following one another, unable to pass. Thierry Boutsen demonstrated this in 1990, keeping his slower Williams car in front of championship leader Ayrton Senna, unable to find a way by. Pit strategy is often crucial; in 1998, Michael Schumacher's Ferrari team changed his strategy mid-race before Schumacher built up a winning margin after all the stops had been made. Passing is a rarity here, although the 1989 race saw a bullish performance from Nigel Mansell in the Ferrari, who started from 12th on the grid and passed car after car, finally taking the lead when Ayrton Senna was baulked by a slower runner. The circuit was modified slightly in 2003 in an attempt to allow more passing.