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The search for Malaysia Airlines Flight MH370, which vanished on March 8 with 239 people on board, has narrowed to a 10 sq km (6.2 sq mile) patch of sea floor about 2,000 km (1,200 miles) west of the Australian city of Perth. Search authorities and the Australian and Malaysian governments have said a series of sonar signals, or "pings", traced to the area may have emanated from the plane's "black box" and present the most credible lead as to its whereabouts. However no pings have been detected in almost two weeks and authorities now fear that, with the flight data recorder's battery several weeks past its expected expiry date, the black box may not emit further signals. "Bluefin-21 has searched approximately two-thirds of the focused underwater search area to date.
Expedition leaders and guides threatened Monday to cancel all climbing on Mount Everest after the deadliest avalanche in its history as hundreds of Nepalese sherpas paid final respects to fellow guides. Accompanied by monks and pick-up trucks bearing the caskets of six victims, the mourners also carried a list of demands that they intend to present to the government, warning all expeditions would be cancelled unless action is taken within a week. The petition was penned after a meeting of expedition leaders, sherpa guides and climbers at base camp Sunday night to discuss how to respond to Friday's disaster, the worst single accident in Everest's history. In a statement, the Nepal Mountaineering Association said the meeting had agreed on "a seven-day ultimatum to the government to address their demands and threaten to stop climbing if the demands are not met".