From the early days of Russia’s invasion of Ukraine, Kyiv has begged the U.S. for Tomahawk cruise missiles for deep strikes into Russia.

The U.S. has been cautious about escalating its involvement in Ukraine into a confrontation with Russia, putting limits on some of the most advanced military hardware it has sent to aid Kyiv’s war effort. One of the key limitations was range, with Washington forbidding Ukraine from using its long-range weapons to strike into Russia itself until November. Ukraine and its most hawkish supporters have long complained that this decision has hamstrung its war effort. Ukrainian President Volodymyr Zelensky is now looking to do away with this range limitation altogether by acquiring one of the longest-range weapons in the U.S. arsenal.