By Megan Shank
Step out of the Beijing airport, and taste the tang in the air. For the remainder of your time in the capital, it will linger, metallic, on the back of your tongue. Is it burning plastic? Coal? The sweat of migrant workers who have come to chase dreams and money? The boozy breath of corrupt officials? The hot asphalt poured for wide boulevards? The lingering dust of razed neighborhoods, a powdery earthen scent that haunts like an odiferous