Australian PM: We owe it to families to

Australian PM: We owe it to families to try to solve Malaysia Airlines Flight 370 riddle
(CNN) -- Despite better weather, the first of five search planes dispatched to look for floating debris that could be related to missing Malaysia Airlines
Flight 370 returned to base Friday without spotting anything of note.

The surveillance planes are looking for two objects photographed by a commercial satellite on Sunday bobbing in the remote and treacherous waters of the
southern Indian Ocean off the west coast of Australia.

Aircraft and a merchant ship scoured the area Thursday, but found nothing in a search hindered by poor weather.

Flight 370 vanished 14 days ago with 239 people aboard, and the announcement Thursday by Australian officials that they had spotted something raised hopes of
a breakthrough in the frustrating search.

On Friday, Australian Prime Minister Tony Abbott defended the decision to announce the find, saying that Australia owes it to families f those missing "to
give them information as soon as it's to hand, and I think I was doing that yesterday in the Parliament."

But he reiterated a warning that two objects spotted by satellite in a remote area of the southern Indian Ocean, which are now being sought by aircraft and
ships, may not be related to the search for the plane.