Bahraini authorities on May 7 arrested prominent human rights activist Nabeel Rajab, according to the country's Interior Ministry. According to his lawyer, Rajab was arrested for messages he posted on Twitter criticizing the Interior Ministry. Rajab is the president of the Bahrain Center for Human Rights (BCHR), a group that has been critical of the Bahraini regime's response to protests and demonstrations in Bahrain which have been ongoing since February 2011. Following Rajab's arrest, the BCHR expressed concern that "[t]he authorities in Bahrain have used many methods in attempting to prevent and/or limit human rights defenders in Bahrain from carrying out their work of documenting and reporting on human rights violations in the country." Rajab was charged with insulting a statutory body and will be detained for seven days.

Colombia's National Police on May 7 announced the surrender of Javier Antonio Calle Serna AKA "Comba"—supreme leader of the country's most powerful drug gang, "Los Rastrojos." But Colombia’s deputy police director Gen. José Roberto León told the reporters that Calle Serna had turned himself in to US Drug Enforcement Administration officials in Aruba three days earlier, and was flown to New York City, where he faces a federal indictment. DEA chief Michele Leonhart told Bogotá's W Radio that Colombian police did not collaborate with US authorities in securing Calle's surrender. She made clear that Colombia played a role only by pledging to extradite Calle Serna if captured. "If the [Colombian] authorities continue to extradite criminals, they will continue to surrender," she told the broadcaster. Furthermore, she did not explicitly confirm that Calle Serna had turned himself in, and the US Attorney's Office for New York's Eastern District also declined to comment.

Khalid Sheikh Mohammed and his four co-defendants were arraigned May 5 in a military tribunal at Guantanámo Bay on charges of organizing the 9-11 attacks. Mainstream accounts are emphasizing the defendants' refusal to respect the court, and the outraged response of 9-11 survivors. Few journalists have been allowed to observe, so this report from AP is all over the Web and has run in several newspapers:

Ali Mussa Daqduq, a former detainee of the US with ties to Hezbollah, was cleared of all charges in an Iraqi court, his lawyer said May 7. The US handed Daqduq over to Iraqi authorities in December as part of the "end of the Iraq War." US President Barack Obama considered trying Daqduq on US soil but was unable to come to an agreement with Iraqi officials. Since no decision could be reached, Duqdaq had to be transferred to Iraq officials pursuant to the 2008 Status of Forces Agreement between the US and Baghdad. Many politicians expressed concern at the time of his transfer that Iraqi courts would not be able to convict Duqdaq. The US government did not immediately respond the dismissal of charges.

The US Court of Appeals for the Ninth Circuit on May 2 granted qualified immunity to former Bush administration official John Yoo over allegations of wrongdoing in relation to controversial memos asserting the legality of "enhanced interrogation techniques." The lawsuit, brought by convicted terrorism defendant Jose Padilla, claimed Yoo's legal opinions endorsing "enhanced interrogation techniques" led to Padilla being tortured. Padilla, a US citizen currently serving a 17-year sentence on terrorism-related charges, said that he was tortured while held as an "enemy combatant" in military custody in a Navy military brig in Charleston, SC. In granting qualified immunity, the panel wrote:

Nicaraguan revolutionary Tomás Borge Martínez died in a Managua military hospital on April 30 at age 81 from pneumonia and other health problems. He was the last surviving member of the small group, including Carlos Fonseca Amador, that founded the leftist Sandinista National Liberation Front (FSLN) in 1961. At the time of his death he was serving as Nicaragua's ambassador to Peru.

About 100 Haitian unionists and activists observed International Workers Day on May 1 with a march in Port-au-Prince to demand better wages and conditions for the country's assembly workers, who mainly produce apparel for sale in North America. Groups organizing the march included the Textile and Garment Workers Union (SOTA), the leftist workers' organization Batay Ouvriye ("Workers' Struggle"), the Women's Network of the Bureau of International Lawyers (BAI) and the Mobilization Collective for Compensation for Cholera Victims (Komodevik). SOTA and Batay Ouvriye have been working since the fall to organize assembly plant workers in the capital.

Left-leaning independent unions dominated celebrations of International Workers Day in Mexico on May 1, while some centrist labor federations decided not to hold marches, reportedly because of concern over security. Tens of thousands of unionists, campesinos and other activists participated in the independent unions' annual march to Mexico City's main plaza, the Zócalo; the left-leaning daily La Jornada reported that more unions and more unionists took part than in previous years.