"You guys all good back there?" co-pilot Scott Klaers asks, twisting around in the tight cockpit to look at passengers in the cramped midsection of the B-25 Mitchell bomber. Despite some trepidation, we flash a thumbs-up and grins. Inoperable Browning .50-caliber machine guns stick out the windows beside, behind and in front of a few select flyers, as we leave Colorado Springs, ascend about 9,000 feet above sea level and skip to Denver at 190 mph. No in-flight movie is needed.