PM Netanyahu's Speech to the United Nations General Assembly in New York
27/09/2012
http://www.pmo.gov.il/English/MediaCenter/Speeches/Pages/speechUN270912.aspx

...Some who claim that even if Iran completes the enrichment process, even if it crosses that red line that I just drew, our intelligence agencies will know when and where Iran will make the fuse, assemble the bomb, and prepare the warhead.

Look, no one appreciates our intelligence agencies more than the Prime Minister of Israel. All these leading intelligence agencies are superb, including ours. They've foiled many attacks.

They've saved many lives.

But they are not foolproof.

For over two years, our intelligence agencies didn't know that Iran was  building a huge nuclear enrichment plant under a mountain.

Do we want to risk the security of the world on the assumption that we would find in time a small workshop in a country half the size of Europe?