Not unexpected, there are many groups out there now, some organized, some not. All believe in Jihad and will try to copy 9/11 Al Qaeda. Let us hope that we have good intelligence coming out of some of the more dangerous groups. So far, we have had good work and good luck with stopping attacks since 9/11. Let's hope that continues.
Let's hope the second and third string terror groups step all over the toes of the pros. Even when 11 Egyptian students decide to go on walkabout, the terror detection apparatus is activated and stones get turned over that wouldn't be otherwise.