Peace and security was one of the topics discussed at the US-Africa summit in Washington. Mozambique is one African country that suffered a long and brutal civil war - it ended more than 20 years ago when the ruling Frelimo party signed an accord with the rebel Renamo movement. But now Renamo guerrillas have gone back into the bush. Zeinab Badawi speaks to Armando Guebuza, president of Mozambique. Is his country in danger of slipping back into conflict?