Cheney, who is considered a strong critic of the Obama Administration, said instead of questioning CIA's interrogation techniques, the White House should focus on Khan's activities.
Terming the investigation of CIA interrogators as an 'outrageous political act', Cheney said it was very important to assure that Khan is not able to resume his nefarious activities.
"The courts in Pakistan have ruled that AQ Khan, the father of the Pakistan nuclear weapon, who provided assistance to the Iranians, the North Koreans, the Libyans, has now been released from custody," Cheney said.
"It's very, very important we find out and know long-term what he's up to. He's so far the worst proliferator of nuclear technology in recent history," Cheney said.
"Marrying up the intelligence platform with weapons is something we started in August of 2001. It's been enormously successful. And they were successful the other day in killing Baitullah Mehsud, which - I think all of those are pluses," Cheney said during a recorded interview to Fox News.
Supporting CIA's interrogation techniques, Cheney said it was due to that policy there were no major terrorist attack in US since 9/11.