Over in the pages of the Washington Post, I argue that in response to Russia’s invasion of Ukraine, NATO has mistakenly drawn a red line in Europe, "one that leaves Ukraine militarily isolated, fending for itself." The West needs to fix this deficiency. By providing weapons to the Ukraine’s armed forces, bolstering their capacity through deployment of Allied intelligence assets and military trainers, and exercising the NATO Response Force in Ukraine, NATO can amend this redline and provide Kiev needed reassurance. None of these steps would present a threat to Russia. They would, however, help deter Moscow from further aggression by forcing it to consider the possibility of a much more costly and prolonged military conflict.