Why do conspiracy theorists say 9/11 was an inside job?

@DennisPrager explains ⬇️ https://t.co/6NKmcfKW8g https://video.twimg.com/ext_tw_video/1833610225674555394/pu/vid/avc1/720x1280/QKDYV85OheuApuGc.mp4?tag=12