While setting on my front porch one morning i heard several jet sounds coming from the west. i was looking up into a grey sky that was actually over cast when something caught my eye to the west. i looked down and saw the profile of what i thought to be a b2 bomber.The profile was right but, almost as soon as i saw it in profile, about 3 seconds it made an abrupt left turn to the north giving me a full view of its underside. there were no markings or numbers and it was navy gray. same as the clouds it flew into. at that point i did see white silt in the wings next to the cockpit on both sides until it disappeared into the clouds to the north.I believe it to be man made but a covert or prototype bomber not known to the public as yet. do you know?