Buenos Aires, May 1 (RHC)-- The Mothers of Plaza de Mayo, one of the leading human rights organizations in Argentina, gathered with thousands of supporters to commemorate their 40th anniversary searching for justice for their stolen babies and the disappeared during the country's "dirty war."

The organization received letters of support from Bolivian President Evo Morales, former Argentine President Cristina Fernandez, and the visit of Colombian human rights activist Piedad Cordoba.

The organization was founded on April 30, 1977, in front of the Casa Rosada presidential palace, to search for their disappeared children who were kidnapped by the military dictatorship. They began marching every week at the Plaza de Mayo in Buenos Aires, demanding answers from government authorities.