An eventful week coming up. And from the point of view of nuclear issues, a good week! On 22nd January the U.N. Treaty on the Prohibition of Nuclear Weapons will come into force. Yes, nuclear weapons will still be there, but no longer respectable, acceptable, and no longer an attractive investment option. The humanitarian cause for ending nuclear weaponry is made clear and legal. This week is good news, too, for the immediately more pressing problems, coronavirus and climate. The inauguration of President Joe Biden on 20th January means that the American government will suddenly take the pandemic seriously and take action. Equally important, it will take action on climate change, and will rejoin the world in the Paris climate treaty.