Lately it's been smaller cells and softer targets. But we all know those attacks are not the end all of their plans. I wonder if a highly coordinated attack could take place somewhere here in the US again, and by what means that they would choose to raise the count of victims. Seems like America is very distracted with infighting right now and vulnerable.
9/11 clown? No. 
Split an atom in your apartment in a major city. Radiation wouldn't be an issue as you'll die anyways.
Fucking 911 clown
Something.
We still have too many rights.
Yes
Spottswoode: From what I.N.T.E.L.L.I.G.N.C.E has gathered, it would be 9/11 times 100.
Gary Johnston: 9/11 times a hundred? Jesus, that's...
Spottswoode: Yes, 91,100.
Joe: Basically, all the worst parts of the bible
They'll do a few more with ARs then we ll see a bomb vest at a festival made out of weed 
There could be a 9/11 × 100. Or even 9/11 × 1,000.
Laziest terrorist ever
First, you thread title makes it sound as if it's a good thing. Bad choice of words.
Yes it could be topped with a dirty bomb or taking out the power grid. Both are terrifying scenarios.
I'm surprised that we've gone as long as we have without another 9/11 style terrorist attack.
Louisianimal - YesThis.
It is hard to imagine, but there cod be much worse attacks. For instance, a nuclear bomb detonated in a major us city.
Just a couple ideas stand out - Dirty nuke and EMP attack.
Oh, and Laziest Terrorist Mastermind ever.
PoiuPoiu - jet into a football stadium ?
Napalm the Super Bowl
Hired Gun - First, you thread title makes it sound as if it's a good thing. Bad choice of words.
Yes it could be topped with a dirty bomb or taking out the power grid. Both are terrifying scenarios.
Was definitely not referring to it as a good thing. I am however very horrified at significance of what this one guy did, and what the two did in San Bernardino. It's terrible to think what may happen if it was many more people working together.
To hear the words of that shooters' Imam saying he isn't against stoning women for adultery is so out of this world bizarre. And now we have Syrian refugees with similar values flooding into the country. Some of which hate us and make no secret of it.
If they would ran an airplane into the White House while Obama is working might top 9/11.
Tough job though. He's hardly ever there.
opieandjimmy - It'll be a big public event, like a football game.
When I was at my cousins graduation this weekend at a civic center I was looking around getting nervous, and that's sad. I get the same feeling in movie theaters now as well, and amusement parks.
I'm very very very surprised a dirty bomb hasn't happened yet.
People always think big events and bombs.
All it would take is 100 guys with ammo like the orlando shooter had and 100 malls and public places on the same day.
I'm sure there are 100 here already that would do it.
Not difficult to pull off, but incredibly difficult to stop or predict. That's what I imagine happening.