JROA, you're just coming back with petty answers that don't do anything to aid in the acceptance of a flat earth.
Like Donk3y said, a fighter jet can circumnavigate the globe in 16 hours. Do you think that anyone who has circumnavigated the globe, be it by foot, car, bike, boat, plane etc is lying?
And obviously i personally can't, but if they can put man on the moon and send satellites to Mars, then why the hell can they send one to the edge of our own planet? Your crappy theory about it being too cold to do so is pathetic.