The individual arrested at Providence yesterday was not linked to the terrorist incidents. The knife he had was a ceremonial curved (I forget the name) knife worn in a sheath. Pretty illegal in one sense but on TOH a religous symbol of faith. Not Islam but another religoin of the middle east...
GS - when I lived in Germany, it was almost every day, we lived astride a NATO low level training route in SW Germany - interesting to say the least... Many states, it is normal for the AF & Navy jets to be around but we don't see it much in the northeat Metropolitan areas. For years, the policy has been to severely restrict military overflights over dense population centers to reduce the likelyhood of an accident. Those dangers are perhaps smaller in comparison to what could potentially still happen but Jaiem is correct, the horses have already run.
Jaiem, the ANG flies F-15As out of Otis AFB on Cape Cod (1 squadron of about 18 active planes - that's a guess)and 16s out ot upstate NY (I think Plattsburg or Syracuse). There are also F16s out of Atlantic City NJ (may have been closed) and Burlington Vermont (may have been closed).
If anyone has fished the east end of the Vineyard (as well as Nantucket), ESPECIALLY Wasque with any regularity, you've heard the Air Force playing around. That is Otis AFB's sandbox with alot of 15s and 16s in the area... I love it when that happens, I get to combine fishing

with my love of air shows

...