1. Multimedia extras introduce visitors to the environs above and below sea level with a 1'0' cityscape taken from across the Halifax Harbour, and animated surveys of the harbour‘s ‘topography.‘ Next, City of Ruins recounts the fatal collision on the morning of Dec. 6 between the relief ship, Imo, and the munitions–laden Mont Blanc – the latter carrying over 2,500 tons of benzol fuel, TNT, picric acid, and gun cotton. (The explosion threw one of the ship‘s gun barrels more than three miles inland, lifted a Navy tug entirely out of the water and onto a nearby pier, and drove a 60–foot wall of water over the Halifax shoreline.) Here, extras include profiles of the ships involved and a "historical docu–comic" paying tribute to the city‘s firefighters.