PBERLIN — It’s a law that has been on the books more than twice as long as the United States has been a country, protecting Germany’s dedicated quaffers from the dangers of inferior brews.Frothy mugs of beer were clinking across the land over the weekend as Germans toasted the 500th anniversary of the country’s famous beer purity law, or Reinheitsgebot, which mandates that German beer may contain only malt, water, hops and yeast.
