PERTH, Australia (AP) - It's been another frustrating day of searching for signs of the Malaysian jetliner that's been missing for more than two weeks.
The Royal Australian Air Force says its planes were stymied by heavy clouds, and nothing was found in the remote area it's been searching in the southern Indian Ocean.
Australia sent planes and a ship in search of a wooden pallet that was spotted by a search plane yesterday, but they've had no luck.
Wooden pallets are often used by ships, but one official with Malaysia Airlines says Flight 370 was, in fact, carrying wooden pallets.
Another potential lead came from France, which provided new satellite data that could indicate possible debris. French authorities say the data consists of "radar echoes," rather than images, in the same part of the ocean where satellite images previously released by Australia and China showed what might be debris from the plane.
President Barack Obama's deputy national security adviser, Tony Blinken, told CNN today that "publicly or privately, we don't know" what happened to the plane. He said, "We're chasing down every theory."
Flight 370 vanished March 8 with 239 people aboard.