Just out of curiosity I decided to see when the last one was conducted. To my surprise there was a subcritical test conducted by Great Britain and the US on the 23rd of Feburary, less than two months before my visit. The last two letters were addressed to President George Walker Bush and the Right Honourable Anthony Charles Lynton Blair respectively. Apparently the test was conducted in an underground installation in Nevada, a state that adjoins the one in which I live.