My son and daughter in law were walking in bethany beach do some window shopping. we stopped my so and i saw a few airplane really high with contrails’ as we observed the plain we saw along with my daughter in law a shiny disk like object approach the aircraft and stop around the aircraft then speed off and blink out. the total time was about 10 seconds. we were talking out loud and the store clerk came out. we were telling him other people were look into the sky,but the object never appeared again. we were all stunned and amazed. we just witnessed a ufo !!!