Dunmore businessman Louis DeNaples’ push for a 40-plus-year expansion of his Keystone Landfill hit a bump in the road this week. While Borough Mayor Timothy Burke’s surprise veto of an unpopular ordinance — one that doesn’t recognize landfills as “structures” subject to zoning regulation — won’t end the debate, it’s notable for being an act of leadership in a place that usually always gives DeNaples what he and his businesses want.