The recent attempt by Iran to launch a missile attack on the UK-US air base on the island of Diego Garcia in the middle of the Indian Ocean has raised questions about the real strength of Iran's firepower. Iran previously has put a self-imposed limit on its ballistic missile program, limiting their range to (2,000 kilometers. Diego Garcia is well outside that range, 4000 kilometres from Iran. And as the war drags on, how much weaponry does Iran have in reserve? Justin Bronk, an airpower and defence analyst at defence think tank the Royal United Services Institute, has told the Associated Press Iran's resources are not limitless.