Heard the one helicopter, then looked out my northeast facing window and could see the helicopter's strobe lights flashing. but what was odd was that it appeared to be following a single white light. the light was as bright as a searchlight so i thought it might be another helicopter. i ran outside to see it before it passed over. that's when i realized that the light was like a single point source, strange, and it wasnt surrounded by any red or green strobing lights. the helicopter was following the light along the same altitude/path. weirdest thing was that i could only hear one helicopter engine. i've seen all sorts of aircraft fly overhead in my 52 years, i've seen meteors explode and space junk burn up in the atmosphere, but this seemed to be the strangest thing i've ever seen. not saying it was aliens, but certainly could not identify it.