A missile launched in Iran in a picture received by Reuters in August 2020. The missile type is part of Iran's growing missile arsenal.WANA (West Asia News Agency) via REUTERSIran has given Russia short-range ballistic missiles, the US said.That will give it more flexibility and firepower to hit the front lines.It also frees up other Russian missiles to go after other targets in depth, experts said.With Iranian ballistic missiles, Russia has a flexibility that could be a big problem for Ukraine.