Pardon me, but.... how can we be sure that this refers to Flight 253 and not to something even more ominous, such as a dirty bomb attack on a major metropolitan area?
I agree. The government is making a big deal out of this while in the past they have not responded this strongly. I think they know more than they are letting on. They may know of other attacks being planned.
We can’t be sure.
What we can be sure of is, that in the long run, this won’t be the end of the attempts.