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That putrid smell that the oil can give off. this oil has really spread out in many directions. in fact, on wednesday when it originally occurred, george, it was about 9 1/2 square miles in diameter. or in circumference. and basically, this took place just about a few miles west of santa barbara. so just putting this in perspective here for you. but by thursday, that's when things change. ocean currents, winds across this region and also waves moving the oil sheen, which is that thin surface layer of oil in all directions. by thursday afternoon, they had roughly 20 different spottings of this ...

Be -- where the aircraft could be. >> for more on what search crews and crash investigators are facing out there, cnn's tom foreman is joining us. hey, tom. >> what they are trying to do in these difficult conditions right now is connect the dots. they know where the plane took off of course. they know where the plane wound up. they know where debris has now been found in that red box down there and they are dealing with currents out here. things that make it difficult. how do they connect the dots here and get really evidence in need. they work in three different layers. there's the surface l...