OnthemorningofSeptember11,2001,computersalesmanagerMich...
问题详情：OnthemorningofSeptember11,2001,computersalesmanagerMichaelHingson,whoisblind,wentearlytohisofficeonthe78thflooroftheNorthToweroftheWorldTradeCentertoprepareforameeting.AsMichaelworked,hisguide...