As others have said nothing. I think people are overstating things in this thread. Ten meters is a large distance, almost a third of an Olympic sized swimming pool, and while I don't doubt there are fragrances which provide ten meters of sillage (a trail) or even projection right out of the bottle I take any claim that they can fill an area with a thirty foot radius after twelve hours of evaporation from only two sprays with a grain of salt. I own and have tried too many of the fragrances listed here to believe that everyone is speaking with a clear head, and from tested and proven results.
Granted I have dry skin and many fragrances don't last long on me, but this doesn't take anything away from those friends have used or which my wife has used. Still, I have some vintage parfums, some Attars and some classic powerhouses and niche fragrances which generally last until washed off, several days longevity, and I have some fragrances which project in a big way, but the fact of the matter is projection declines over a scents life. In order for a fragrance to be projecting ten meters after twelve hours I have to wonder how far was it projecting out of the bottle, and with a mere two sprays?
Sounds like fantasy.
Edit: just to further reinforce my point. Let's consider Le Male and A*Men, both popular fragrances many people here claim have ten meter projection after many hours. These scents are popular in my country, and if this were true you'd think whenever I went to a mall, or walked the city streets or got on a train there'd be someone wearing one of these scents and I'd be floored by their sillage. In fact if this were the case I'd imagine most crowded public spaces would smell of little else. Yet I can say with certainty that this this is absolutely not the case. Occasionally I pick up a whiff of something recognizable and popular like 1 Million or Le Male when I walk by someone on the street, but that's it.
8 hours of close projection though i can do with several frags (tobacco vanille, l'instant extreme, etc.)
