Monday morning Nov. 12 about 10:10 I saw two helicopters heading west, then two minutes later headed back southeast toward Philly. I saw the same two helicopters do the same thing two days prior on Saturday Nov. 10 at 10:10 AM. They looked like military helicopters to me but I can't find them online. Each has 8 main blades. Anybody know what's going on or what model they are?