①Elon Musk strikes deal to buy Twitter for $44 billion. ②Latest in Ukraine war: Biden names a veteran diplomat the US ambassador to Ukraine, and Russia’s Sergey Lavrov warns the threat of nuclear war shouldn’t be underestimated. ③The US looks for closer ties to Brazil at a time of turmoil. What's the position of Brazil in the US foreign policy spectrum? ④China will start engineering its phase-4 lunar mission this year. We look at China’s plan to build a research station at the Moon’s south pole.