It wasnt leaning like the tower of Piza but dependeng on the angle photographed , it was leaning and on fire for several hours and had a huge chunk 20 stories missing and other damage and the article does a great job of explaining 7's collapse .No reputable engineer disputes the explation in the uspolitics .tribe .net link .It wasnt stright down but it was more in its' footprint than 1&2 due to structural features described in the link which people are too lazy to read .If it fell in its' footprint Verizon and 30w broadway wouldnt have been severely damaged.