"... The sites in Iran that have been damaged would appear to be significant targets.
The nuclear facilities in Isfahan are involved in converting yellowcake into uranium hexafluoride gas, a key step in producing enriched uranium. Two weeks ago, an explosion at a missile base west of Tehran killed more than 20 members of Iran's Revolutionary Guard Corps, including Cmdr. Hassan Moghaddam, described as the architect of Iran's missile program.
These, experts note, are only the most recent cases; a half-dozen other mysterious explosions and accidental deaths have been reported over the last two years. They include an October 2010 explosion at a military base housing Shahab-3 missiles near the city of Khorramabad and the July 2011 assassination of nuclear scientist Dariush Rezaei in Tehran.
Stuxnet, a computer virus that wreaked havoc on the centrifuges in Iran's uranium enrichment facilities, has rewritten the playbook for international cyber-terrorism..." (Miami Herald)