Hard to believe it was 8 years ago. But the repercussions are with us every day.
Those people who opposed the Iraq war but still believe the official 9/11 story often take the following viewpoint:
"Iraq was a big mistake, a distraction (etc)... oh, but I believe we
started out doing the right thing in Afghanistan, since it was there that the people who murdered three thousand Americans are hiding... but then we lost our compass..."
Barack Obama is such a person. Hence the troop surge in Afghanistan. The other day on TV he cited 9/11 as the reason we're there. Five troops were killed in Afghanistan today.