Explosion at Iran Missile Base: Accident or Sabotage?

An explosion at a ballistic missile base near Tehran killed 17 people Nov. 12. Among the victims was Brig. Gen. Hassan Moghaddam, reportedly the architect of the Iranian surface-to-surface missile program and the developer of the Shahab-3 medium-range ballistic missile. While the significance of the base and the timing of the explosion suggest sabotage, there are numerous ways an accidental explosion could have taken place.