Brazil's government will now investigate human rights violations committed by the right-wing military dictatorship that ruled the country from 1964 to 1985.
Marchers, 100,000 of them, filled the Plaza Bolivar in the Colombian capital, Bogotá.
Until recently, the United States has operated 22 U.S. military bases in Latin America, 800 worldwide. Now there are two more, one in Chile and another in Argentina.
Summit of the Americas reflected a shift from the "Washington Consensus" to the "consensus without Washington."
The assassination was tragedy, and so too was violent upheaval that within 48 hours took 330 lives in Bogota and killed 3000 people throughout Colombia.
The Bolivarian Alliance for the Peoples of our America held its eleventh meeting Caracas, Venezuela, to decide on a joint economic program.
Lopez Obrador is again offering a sharp break from the right-wing policies.
Some 80 participants attended from the U.S., Mexico, Cuba, Brazil, and Uruguay.
Cuban President Raul Castro told reporters that, "For the first time in history we will have an organization of Our America."
Every year governments and human rights groups are supposed to be campaigning for increasing resources and public awareness aimed at ending violence against women.