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In the depths of Australia's desert there is a US-Australian joint defence facility known as Pine Gap.

While much of its operation is secret, Pine Gap is known to be involved in numerous military satellite operations, and as a result, is often targeted by protesters.

In December 2005, four members of a non-violent group called "Christians against all terrorism" broke into the base, alleged that the facility was a spy base pinpointing targets in the wars in Iraq and Afghanistan and said they felt morally obliged to stop what they saw as Australia's secret cooperation in the war.

Against the backdrop of the 'war on terror', the Pine Gap Four, as they came to be known, were tried under an unused, untested piece of legislation from the Cold War era that carried a sentence of seven years.

How did four untrained activists manage to break into the most secure base in Australia? And have the efforts of the Pine Gap Four actually brought about any change?

This episode of People & Power aired from Saturday, March 21, 2009.