Iran places trust in 'passive defense'

Iran places trust in 'passive defense'
Contrary to reports claiming Iran wanted to hide the existence of nuclear facilities from the outside world, it actually wanted Western intelligence to conclude that it was putting some of its key nuclear facilities deep underground. Tehran believed it needed to convince United States and Israeli military planners that, in the event of an attack, they wouldn't be able to find and destroy a number of Iran's nuclear sites. - Gareth Porter

http://www.atimes.com/atimes/Middle_East/LA13Ak06.html