Malaysia Airlines Flight 370 has been missing for more than a month. The Australian Navy has recently picked up several signals from the plane's black box; officials are now confident that the plane will be found: "The signals detected 1,645 kilometers (1,020 miles) northwest of Perth are the strongest indication yet that the plane crashed and is now lying at the bottom of the ocean in the area where the search is now focused."
But "bottom of the ocean" is a long, long way down — just shy of three miles down.
What the Washington Post calls "the depth of the problem" is in effect this: the plane's wreckage may be more than 2,000 feet deeper in the ocean than the wreckage of the Titanic, which, as the Post notes, took 73 years to find.
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"Hopefully in a matter of days, we will be able to find something on the bottom that might confirm that this is the last resting place of MH370," said Angus Houston, head of a joint agency coordinating the search.