ISLAMABAD: National Accountability Bureau (NAB) Chairman Qamar Zaman Chaudhry has said that NAB believes in zero corruption and ensuring 100% development in Pakistan. He was chairing a meeting to review performance of all wings of NAB here on Monday. He said an effective accountability mechanism is essential for economic growth, investment and stability of social order. He said that transparency is a prerequisite for promoting investment and economic growth. He said that NAB has established its forensic science laboratory in Rawalpindi which has facilities of digital forensics and fingerprint analysis.