Cities throughout the world will be holding one-year anniversary events to continue the pressure for answers.
Mack was murdered by a military death squad due to her criticism of the Guatemalan government's treatment of the indigenous Maya.
"This visit to Guatemala reinforced how important it is to include strong labor protections in our trade deals and to make sure the U.S. follows through with enforcement of those rules."
Imprisoned Swazi human rights leader Mario Masuku and student activist Maxwell Dlamini were granted bail by the Supreme Court of Swaziland.
The U.S-backed Colombian government has presided over what may be one of the worst cases of mass atrocities perpetrated against innocent populations.
A quarter of a million angry voices challenged the government's "dangerous and unjust" spending cuts at the weekend.
The U.S. has talked of supposed maltreatment of "political prisoners" in Cuba. Cubans need simply say "Guantanamo" to put that in perspective.
Police repression has failed to stop a wave of protests sweeping Mexico demanding the return of 43 kidnapped students in the state of Guerrero.
Each year, on Dec. 10 the world remembers the day in 1948 when all nations came together in Paris to sign the Universal Declaration of Human Rights.
From June 4-11, people around the world will take action on behalf of three Cuban patriots wrongfully imprisoned in the United States.