If a peace deal between Russia and Ukraine ever comes together, the United States could take the lead role in monitoring a large buffer zone inside Ukraine envisioned as a way to protect the country from Russia, according to four people familiar with a plan that military officials from Ukraine’s allies, including the United States, have been discussing. -snip- On the latter front, the United States is discussing with Ukraine a deal that could be worth around $100 billion, under which Kyiv would be able to buy American weapons, while in exchange the United States would get intellectual property rights...