This afternoon, IDF spokesperson Effie Defrin says Israel has “air freedom all the way to Tehran”.
But air defences are not the only thing protecting Iran’s extensive nuclear operations.
Many of Iran’s most important facilities are buried deep underground, protected by layers of earth and reinforced concrete.
The fuel enrichment plant at Fordow, for example, is thought to be around 80m (262ft) below the surface, while analysts say a new facility at Mt Kolang is even deeper.
Targeting sites like this requires specialist bombs, such as the GBU-57/B, or Massive Ordnance Penetrator (MOP). Colloquially known as "bunker busters", this huge 30,000lb bomb is capable of destroying targets buried under about 60m of reinforced concrete.
But the US is not currently taking part in the strikes, and Israel does not possess the MOP.
As for what they do have, the most effective weapons they possess are the ROCKS or the Air LORA, air-launched ballistic missiles capable of destroying up to 6m of reinforced concrete.
According to Justin Bronk of the Royal United Services Institute (RUSI), attacking a deep facility with these would require multiple precise strikes at the same point to "burrow down".
With each strike destroying around 6m of concrete, reaching sites like Fordow or Mt Kolang looks like a remote prospect.
According to Alon Pinkas, who advised two Israeli prime ministers, Israel simply does not possess the stocks of munitions for the task.
The more realistic option would be to target entry and exit tunnels, rendering the facilities unusable.
The issue with this strategy, according to the RUSI report, is that Iranian efforts to dig down to the facilities and re-establish access "would likely begin almost immediately". All of which serves to explain why Bronk and others say destroying Iran's nuclear programme through military means is "not feasible". Undoubtedly it can be set back, especially through the extensive assassinations of top scientists, but as long as the regime survives, it will attempt to build back.