10meter 100 kilometers 百公里 The metropolitan area of Chicago nestles at the south end of the lake.On a day like this. somcone walking along the street might have looked up to a blue sky;but the camera plane was flying so high it would have been hard to pick out.The lattice visible among so many blurred streets is the mile-square grid of wide Chicago boulevards. m▣P.C▣m一 百 公 里