An ELT signal was detected a couple of minutes before the first impact and another was detected a couple of minutes before the second impact. Both were detected

An ELT signal was detected a couple of minutes before the first impact and another was detected a couple of minutes before the second impact. Both were detected from Lower Manhattan. Furthermore, nothing was detected from either plane at the moment of impact. This is a bit too much coincidence for me. I have no idea what could have caused this, but you have to blatantly ignore a number of red flags to swallow the official explanation.