My son his wife and i were in bethany beach de. on november 6, 2016 at 11:10am. the sky was chrystal clear blue. we observed 3 military plains flying east at about 25 thousand ft about a mile apart heading out over the atlantic ocean with long contrails. we were talking about how clear we could see the aircraft. all of a sudden out of the north east we saw a bright silver acorn shaped object approach the middle aircraft. flew over top and at the same speed as the aircraft for about 4 seconds. then shot off at a high rate of speed to the south west and disappeared. we looked at each other saying what was that! we concluded we just saw a ufo.. we were beside ourselves!! what we saw was real and very clear!! i called dover air force base. they said it wasn't their jurisdiction and to call philadelphia international airport. called them. they listened and said to call dover air force base. no one wanted to talk about it!!! strange !!