France is not confident Syrian strongman Bashar al-Assad will fully implement a ceasefire deal brokered by UN envoy Kofi Annan before an April 12 deadline, Foreign Minister Alain Juppe said Thursday. \"Can we be optimistic? I\'m not,\" Juppe said, when asked by journalists about hopes that Annan\'s plan might bring an end to the Syrian regime\'s violent repression of a popular revolt against Assad\'s rule.