The first report concluded that a bomb was feasible. It described it in technical detail, and provided specific proposals for developing it, including cost estimates. A plant to produce one kilogram of uranium-235 per day was estimated to cost £5 million and would require a large skilled labour force that was also needed for other parts of the war effort. It could be available in as little as two years. The amount of damage that it would do was estimated to be similar to that of the Halifax explosion in 1917, which had devastated everything in a radius. The report warned that Germany had shown interest in heavy water, and although this was not considered useful for a bomb, the possibility remained that Germany could also be working on the bomb.