Tank armour soon developed beyond the point at which an anti-tank rifle could practically be carried by an infantryman, and by the Second World War rocket weapons such as the US bazooka and German Panzerschreck were in service. Development continued after the war, with weapons such as the RPG-7, although a need to increase range led to the development of guided weapons to fulfill the anti-tank role. Most modern armies now use guided missiles for long-range engagements and rockets for close-range or emergency use; disposable weapons such as the RPG-26 are popular for this.