Possible 9/11 style attack in US this summer?

I spoke with a friend of mine when I got back in town this past Saturday and terrorism came up as he works with the government and he said based on his conversations lately that an attack was highly likely in the near future. So its funny that this article appeared on ABCNEWS.COM today. My advice, sontinue on with your life but certainly be more aware of your surroundings and where you go, I personally would not want to be in NY or LA anytime soon. I do think an attack is likely this summer or fall. The up ramp in the little attacks in Europe and Scotland definatly worry me.