Amazon and Walmart brace for crucial Diwali showdown

Around 6 a.m. each morning, more than 150 women troop into a multilevel warehouse in the suburbs of Chennai, a coastal city in southern India. To the humming whir of giant overhead fans, they scurry around the vast metal-covered depot, sorting parcels by zip code and tossing them into giant cage-like bins, wheeling around enormous package-laden trolleys, and loading boxes on conveyor belts.