was on porch with daughter when these 12-18 craft flew over us (silent) at 3000-5000 feet at around 100-120 mph in a V formation. got behind trees, we ran out to other side of trees to see them again. daughter noted another set of these crafts in a V formation also. they were around 2 miles out, when they came closer together. the first group we saw started flipping and flying very strangely, but staying in formation. then we noticed a black larger object flying very close to these objects in a different direction, out of there formation. I found the exact objects that we saw on you tube (the best ufo sightings in the united states 2015)