Russia's invasion of Ukraine is only just over a week old, but, by every indication, Ukrainian forces have already been able to inflict significant losses on the invaders in terms of personnel and material. Shoulder-fired surface-to-air missiles, also known as man-portable air defense systems, or MANPADS, have been a key factor in preventing Russian forces from gaining critically important air superiority. Infantry anti-armor weapons, both guided and unguided, have been equally valuable for Ukrainian troops, who are facing a heavily mechanized foe on the ground. The Grom family of missiles, the first versions of which entered service in the 1990s,...