In contrast, there has been a steady flow of Western-supplied weapons going into Ukraine, which has been a boost for its morale. The US has just announced it will be providing an additional $800m in defence support. As well as more anti-tank and anti-aircraft missiles, it is expected to include Switchblade, which is a small, US-developed, "kamikaze" drone that can be carried in a backpack before being launched to deliver a small explosive at targets on the ground.