The world's largest low-cost carrier by fleet size, Dallas-based Southwest Airlines, changed the way Americans fly. With its low fare model and, until this year, free two checked bags, the airline ...

And that shoe is the Nike Streakfly 2. Though the Streakfly looked similar to the Zoom Streak, it offered a softer, squidgier ride. More disappointingly, for a shoe billed as an out-and-out racer ...