A test of a Neptune missile in April 2020.General Staff of the Armed Forces of UkraineUkraine faces restrictions on using US-made, long-range missiles to strike targets inside Russia.To work around this, Kyiv has modified its Neptune anti-ship missile for land attack.Ukraine has used this weapon to strike energy facilities inside Russia in recent weeks.The US has outfitted Ukraine with an arsenal of long-range missiles but continues to put restrictions on how it can use them, limiting its ability to strike Russia the way it wants.