Fears are mounting that unexploded WWII munitions buried in Belgium’s High Fens could detonate as underground peat fires continue to smoulder following the country’s worst wildfires in recent history. The blaze, which tore through roughly 30 square kilometers (12 square miles) of the nature reserve, has burned deep into peat layers, forestry officer Yves Pieper said. Since the area was a Battle of the Bulge battleground, old ammunition remains b…