What we know and what we don’t about dive boat Conception’s demise

Amid anguish over 34 lives lost in the fire that consumed a recreational diving boat off the Channel Islands this week — one of the worst passenger boat accidents in modern history — a central question lingers: What could have caused such a swift, deadly catastrophe?
Speculation has swirled from overheated lithium batteries in charging cell phones and laptops to enhanced oxygen to prolong dives and electrical wiring.
But as investigators probe the Labor Day disaster, attention is foc