Cities across France were paralyzed by a massive public transport strike against a planned overhaul of France’s pensions system, in a test of President Emmanuel Macron’s resolve to modernize the economy. Trains, including the high-speed line between Paris and London, subways and buses were severely curtailed if not halted altogether. Hundreds of flights were canceled. Many schools, and nurseries remained closed, while several museums, including the Louvre, said parts of their collections might not open. Even the Eiffel…