An Army grunt stands in the rain with a 35-pound pack on his back, 15 lb. weapon in hand, after having marched 12 miles, and says, "This is shit!" An Army Airborne Ranger stands in the rain with a 45 lb. pack on his back, weapon in hand, after having jumped from an airplane and marched 18 miles, and says with a smile, "This is good shit!" A Navy SEAL lies in the mud, 55 LB pack on his back, weapon in hand, after swimming 10 miles to shore, crawling through a swamp and marching 25 miles at night past the enemy positions, says with a grin, "This really is great shit." A Marine, up to his nose in the stinking, bug infested mud of a swamp with a 65 LB pack on his back and a weapon in both hands after jumping from an aircraft at high altitude, into the ocean, swimming 12 miles to the shore, killing several alligators to enter the swamp, then crawling 30 miles through the brush to assault an enemy camp, says, "I love this shit." The Air Force NCO sits in an easy chair in an air-conditioned office, and says, "My e-mail's out? What kind of shit is this?"