I stood directly under a gigantic spacecraft no more than a couple hundred feet above my neighborhood.

Standing in the center of the valley where i lived(valley is approximately 300 yards wide from ridge to ridge) looking straight up, i saw a massive, triangular craft moving across the two ridgelines, from north to south, just feet from the mountaintops.  It made no sound whatsoever.  I couldn't exactly makeout the shape of the craft at first, because it appeared that the entire sky was moving. 
After watching in awe for a moment, i noticed that some of the "stars" were flashing like a dim strobelight.  A line of these lights extended down the center of the craft, and the outer edges appeared to have similar luminations but more widely spaced.  The size of the vehicle i saw is indescribable, other than that it covered the entire sky.  Even after many attempts to find pictures of a similar craft, as well as witnessing other ufo phenomenon i have yet to see anything in comparison.  
I was twelve about twelve years old at the time and this event has changed my entire outlook on life, religion, history, and the future. 
At the age of seventeen, i joined the Marine Corps and was selected for Signals Intelligence(mos:2631) at Parris Island, SC. Years in this field revealed to me even more strange and sometimes unexplainable craft all over the world. 
I am now 28 years old, and continue to watch the skies for any more evidence of extraterrestrial travel in our skies.
Witness indicates that the date of the sighting is approximate.  PD