So, you’ve booked a flight from the good ol’ U.S. of A. to East Asia. Congratulations! You’re one step closer to delicious street food, neon-lit nights, and an impressive collection of travel selfies. But before you start daydreaming about cherry blossoms in Japan or night markets in South Korea, you have to conquer the Everest of travel experiences: the long-haul flight. We’re talking 12 to 16 hours in a recycled-air metal tube where time loses all meaning and your legs f