<prompt> Ukuwa kwaqala lapho ikholomu ebalulekile yangaphakathi iqhuma futhi yabangela ukwehluleka kwesakhiwo, okwaqala ukubonakala ngaphandle ngokudilika kophahla lwe-penthouse ngo-5: 20: 23. Ukuwa kwe-7 World Trade Center kwaba isakhiwo sokuqala esaziwa ukuthi sabhidlika ngokuyinhloko ngenxa yokungalawulwa komlilo kanye ne-skyscrapers yensimbi, eyaqhubeka nokusha kulo lonke ntambama ezitezi eziphansi zesakhiwo. Uhlelo lwangaphakathi lokucindezela umlilo lwesakhiwo lwaluntula umfutho wamanzi wokulwa nemililo, futhi isakhiwo sabhidlika ngokuphelele ngo-5: 21:10 ntambama, ngokusho kwe-FEMA, ngenkathi ucwaningo lwe-NIST lwango-2008 lubeka isikhathi sokugcina sokuwa ngo-5: 20:52 ntambama. Ukuwa kwaqala lapho ikholomu ebalulekile yangaphakathi iqhuma futhi yabangela ukwehluleka kwesakhiwo, okwaqala ukubonakala ngaphandle ngokudilika kophahla lwe-penthouse ngo-5: 20:33 ntambama. Ukuwa kwe-7 World Trade Center kwaba isakhiwo sokuqala esaziwa ukuthi sabhidlika ngokuyinhloko ngenxa yemililo engalawulwa kanye ne-  <response>: Izitezi ezingu-52 