United Nations Secretary-General Ban Ki-moon, who flew to Liberia on a four-nation African tour, said he was in the country to monitor progress being made here. Mr. Ban has been carrying a simple message from Accra to Monrovia and would certainly do the same in Ouagadougou and Abidjan, a message that African nations should not roll back their respective gains, be it in development as in Accra and Ouagadougou or peace and security as in Monrovia and Abidjan.