A MAS follower shows a propaganda for the "Yes" option for new constitution project while followers of the MNR (Nationalist and Revolutionary Movment) are protesting to induce people to vote for "No" toption. The MAS is the newset political party in the country, while the MNR is the oldest one which impulse the 1952' revolution in Bolivia with Jaime Paz Estensorro. the ultimate MNR president ,Gonzalo Sanchez de Lozada escape from Bolivia in 2003 during what have been called the "gas war".