while flying from Minneapolis to fort Myers aboard a delta plane on Sunday December 14 2014 between 11:00a.m. and 12:00p.m there was a heavy cloud cover below i am not sure what state we were over either south eastern Georgia or the pan handle of Florida i noticed what looked like a flock of geese flying in formation realizing geese do not fly that high i starting watching this formation as it approached like floating it looked like a clear rectangular plastic box with what looked like burlap sacks hanging in it after a few minutes it started a slow turn west i believe. even though i could see through it the inside and outside corners i could make out having never heard of a clear rectangle U F O i just wondered if anyone else reported it or if you have seen anything like it. that you for any information in this matter