Responding to Elon Musk's criticism of flying cars, Uber CEO Dara Khosrowshahi said, "Challenge accepted. Improved battery tech (thx 2 @elonmusk)... will be much more efficient and avoid noise." Khosrowshahi earlier said, "Why dig tunnels when you can use the air?" to which Musk responded by saying, flying cars "blow away anything that isn't nailed down when they land."

Aditi Verma / 07:08 pm on short byon