Mexicans spark up for marijuana legalization

Protesters smoked joints and walked from Zocalo, Mexico City's main square, to the Independence Angel monument.

In March, Mexico's lower house of Congress approved a bill that would decriminalize cannabis for recreational, medical, and scientific uses, bringing it a step closer to creating one of the world's largest markets for the plant.

Backed by the administration of President Andres Manuel Lopez Obrador, the bill marks a major shift in a country bedeviled for years by violence between feuding drug cartels. Now, the Senate needs to review and approve the bill.