World Bank President Paul Wolfowitz, who has promised to crack down on corruption, has appointed Suzanne Rich Folsom to head the bank's anti-corruption unit, according to a notice to member countries. Folsom, a US national, has been acting director of the World Bank's Department of Institutional Integrity since October 2005 following the departure of Maarten de Jong .She joined the bank in 2003 as counsellor to then World Bank President James Wolfensohn and will retain that post as well under Wolfowitz.