It has now been determined that the explosion at the Fukushima Dai-ichi nuclear power plant some 150 kilometers north of Tokyo was actually caused by efforts to avert a meltdown, technicians having taken a calculated risk with a decision to vent radioactive steam from the severely overheated reactor Number 1. The release set off a hydrogen explosion which partially destroyed the outer turbine building. This did relieve some of the pressure that has been building up in the reactor containment core since off-site power was lost due to the earthquake, halting the flow of coolant water. But the reactor has not yet been brought under control. Four workers were injured in the explosion, and three were later hospitalized for ­radiation exposure.

Four were killed in fighting between anti-government protesters and security forces in Yemen March 12, even as President Ali Abdullah Saleh promised the White House that he would not use violence against the demonstrators. At least three people were killed in the capital, where some 100,000 staged a sit-in at Sanaa University to demand Saleh's ouster. As police used tear gas to break up the sit-in, pro-government snipers opened fire from rooftops. The fourth casualty, a 14-year-old boy, was killed in a protest the southern port city of Mukalla. In a bid to counter what he called "sedition," Saleh went on TV to pledge a referendum on a new constitution later this year, which would devolve further powers to parliament. But the move was dismissed by the opposition. "The president's initiative is too late and constitutes the last breath of the political regime which protesters demand and end to," parliamentary opposition spokesman Mohammad al-Sabri said. (NYT, Middle East Online, March 11)

Sen. John McCain (R-AZ), along with five co-sponsors, introduced legislation March 10 that would prohibit funding for civilian trials of Guantánamo Bay detainees and place restrictions on the transfer of detainees to foreign countries. The Military Detainee Procedures Improvement Act of 2011 would require "greater scrutiny on the security situation and ability of the host country to monitor a detainee" after transfer from Guantánamo. It also purports to "[r]eaffirm[] the President's authority to detain members of al-Qaeda, the Taliban, and affiliated terrorist groups based on the authority granted by Congress in the Authorization for Use of Military Force." The legislation would require members of terrorists groups affiliated with al-Qaeda and the Taliban to be held in military custody when captured, and require annual review of whether detainees can be released.

An explosion at the Fukushima Dai-ichi power plant in northern Japan on March 12 blew the roof off one building and destroyed the exterior walls of a crippled reactor, but officials said the steel containment core around the reactor had not been breached, and denied that a major meltdown was imminent. Government officials and executives of Tokyo Electric Power gave what the New York Times called "confusing accounts" of the causes of the explosion and the damage it caused. But the explosion apparently occurred in a structure housing turbines near the No. 1 reactor at the plant rather than inside the reactor itself. The Nuclear and Industrial Safety Agency said serious damage to the containment core was unlikely despite the explosion.

Police in Bahrain fired tear gas at anti-government protesters March 11, as thousands marched on a square near the royal palace in Manama. Protesters were also confronted by a group of pro-regime loyalists armed with golf clubs, knives, swords, metal pipes and sticks embedded with nails. A clash ensued for control of the square as the mainly Shi'ite protesters hurled stones at the mainly Sunni regime supporters. Earlier, protesters chanted "Peaceful, peaceful" and handed flowers to police in a bid to avoid violence. Government loyalists chanted "Long live the Bahraini monarchy," and "The people want Khalifa bin Salman," referring to the long-time prime minister whose ouster the opposition demands. (Middle East Online, March 11)

The Israeli government is trying to use a "divide and conquer" strategy on the Bedouin community in the Negev Desert in order to seize its lands, Bedouin representatives charged March 10, in response to a reported initiative to settle the issue of "unrecognized" villages. A special committee is reported to have prepared a plan under which Bedouins who can prove a historical link to their land could receive financial compensation for a portion of their lots. If the Bedouins accept this offer, the extent of land that could be included in the deal would be approximately 150,000 dunums (about 40,000 acres)—less than half of the land the Bedouins lay claim to.

In the wake of the March 10 devastating earthquake and tsunami, which have left perhaps 1,000 dead, Japan's government has for the first time declared a "nuclear emergency." Diesel backup systems ceased functioning at the Fukushima Dai-ichi plant's reactor Number 1, run by the Tokyo Electric Power Company (TEPCO) in Fukushima Prefecture (Tohoku region, north of Tokyo). Temperatures are rising in the reactor, and the government has ordered 2,000 residents within a three-kilometer radius of the plant to evacuate. The plant may have risen to 2.1 times its designed capacity, and authorities are considering a controlled release of radioactive gas and steam to relieve the pressure.

Mauritanian police clashed with pro-democracy demonstrators March 8 in Bloc Square, central plaza of the capital, Nouakchott. Police used tear gas and clubs to disperse the protest, organized by the February 25 Youth Co-ordination group, leaving at least 18 hospitalized. The government had allowed young protesters to rally freely in the square since Feb. 25, but on March 4 announced that all public demonstrations must be authorized. Thousands continued to gather in the square daily, without an official permit, chanting "People want reforms, change or you will be changed!" (Magharebia, March 10; Middle East Online, March 9)