Revolution may be coming quickly to Yemen. The country's president, Ali Abdullah Saleh, is losing support. A division of the Army says it will now protect protesters who have been calling for the president's resignation. Tanks and armored vehicles under the command of three generals who have defected this morning have positioned themselves in the main square and outside the Presidential Palace. 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.