You can find images galore of stranded travelers and vehicles stranded because they depend on a clear, unfrozen road or runway on which to roll, and with which to maintain traction, but the roads and runways are buried in snow and/or coated with ice. I chose a particularly disgusting one of a major highway in England (from Britain gridlocked after heavy snow brings travel chaos).
One of the most telling indications of the evil motive behind this gridlock is that it's not the first time that Heathrow, one of the busiest airports in the world, has been shut down by snow and ice. There is no good reason for it having been shut down right during the Christmas rush. (Now who would want to make people going on Christmas vacation suffer instead?) So, this indicates that it was intentional, and not just incompetence.