I'm not in the US, but they've been passing by a bit more frequently over here, as well.
Discussion
Are you on the east or west coast?
East. But I have a friend on the West who had the Blue Angels go by yesterday (which is admittedly a little differrent). Here it was two jets in a line.
It could just be routine security drills, but I would understand why they're performing them a bit more frequently. NYC is obviously a prime target. Hitting there first would send the entire US populace into disarray, and then the entire nation would be open to attack.