When can you start? <a href="http://pmredx.com/20814-2/">best rx promotions</a>  The assault is the latest indication of the ease with which the Islamist rebels, ejected from Mogadishu by African peacekeeping forces about two years ago, have been able to organize and threaten the government's fragile security gains. Last month al Shabaab attacked a United Nations base in Mogadishu, killing 22 people.