Champagne Bottle Sparklers Caused Deadly Swiss Bar Fire, 40 Dead

• A New Year's Eve fire at Switzerland's 'Le Constellation' luxury resort bar killed 40 and injured over 100.
• Investigation reveals fountain candles (sparklers) attached to champagne bottles ignited the bar's ceiling.
• The fire spread "extremely rapidly" due to "acoustic damping foam" in the ceiling, suspected to be against safety regulations.
• Chief prosecutor Béatrice Pilloud is probing the incident, including fire extinguishers and exit routes.
• Bar owners, a French couple, are being questioned and could face arrest if implicated in the investigation.

Why It Matters: Deadly Swiss bar fire caused by champagne bottle sparklers and rapid spread due to unsafe foam.