A historic bicentennial anniversary is upon us. The humble pint is now 200 years old. That staple measurement of bar life was first introduced in 1824 to placate British drinkers who claimed taverns were cheating them of precious ale. Now those public houses are facing a crisis: what happens when the public no longer heads to the pub? Special correspondent Malcolm Brabant reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders