Tech Howl for June 29

Yahoo Finance senior writer Melody Hahm fills in for Dan Howley on the latest edition of Tech Howl. Today's topics: Facebook tries to win back the public's trust with transparency; Xiaomi, "The Apple of China," goes public with a $4.7 billion IPO; and Tesla scrambles to keep up with production goals — with CEO Elon Musk reportedly sleeping under his desk at the office.