Yemeni President Ali Abdullah Saleh has signed a deal under which he will step down, officials say.
Tensions are escalating in Yemen, where thousands have protested the rule of President Ali Abdullah Saleh. In the meantime, violence is worsening, parts of the country have fallen out of the government's control and Yemen's economy is collapsing.
Revolution may be coming quickly to Yemen. Gregory Johnsen, a Yemen expert at Princeton University and Hakim Almasmari, editor of the Yemen Post newspaper discuss a country on the brink of change.