>>4
Reptilians did it. The stuff they put in chemtrails burns at 5000K, which melted the steel, which caused the cruise missile to malfunction and take out the surrounding buildings. Jews agreed to take blame to restore peace with the Greys. The Pentagon was blown up when a CIA time travel malfunctioned. The Pennsylvania field one was a defective plane by Boeing, and was blamed on Al Qaeda to lay the groundwork for an attack on Syria.