There were further violent clashes between anti-government protesters and security forces in Yemen on Friday. Marco Werman talks with Charles Dunbar, former US Ambassador to Yemen, about the latest developments in that country.
General Ali Mohsen al-Ahmar, who is close to President Ali Abdullah Saleh, says he is backing the protest movement against the regime. Two other senior army commanders are also reported to have resigned.
The uprising in Yemen is escalating. But President Ali Abdullah Saleh, who has ruled the country for three decades, remains defiant. Anchor Lisa Mullins speaks with the BBC's Natalia Antelava, who has just returned from Yemen.