OnthemorningofSeptember11,2001,computersalesmanagerMich...
問題詳情：OnthemorningofSeptember11,2001,computersalesmanagerMichaelHingson,whoisblind,wentearlytohisofficeonthe78thflooroftheNorthToweroftheWorldTradeCentertoprepareforameeting.AsMichaelworked,hisguide...