"This week." Showdown. Putin asses more troops, Obama demands a pullback. Is a N invasion next, or will diplomacy prevail? We get answers from Putin's man in Washington. An ABC news exclusive.... See More
"This week." Showdown. Putin asses more troops, Obama demands a pullback. Is a N invasion next, or will diplomacy prevail? We get answers from Putin's man in Washington. An ABC news exclusive. Christie's comeback? People do inexplicably stupid things. Has the feisty governor put bridgegate behind him, or will another shoe drop? We have exclusive interviews with the two dueling investigators. Plus, baseball's opening day is here, and ESPN's Keith olbermann joins us live. Hello, again. Lots of ground to cover this Sunday morning. Let's get right to the latest on the search for flight 370. With the clock ticking down on the black box batteries, more ships and planes have joined the massive effort to identify debris. ABC's David Wright is embedded in the search. Good morning, David. Reporter: Good morning. From the deck of the ocean shield, an Australian vessel built to handle the roughest seas. Sub-antarctic conditions. This ship is now getting set to ship out into the search area. It'll take three to four days just to reach the search area. Hopefully by then, search teams will have found the debris field from flight 370. Ten planes out looking. Several reporting they have spotted objects in the water. But until surface vessels are able to retrieve them, we won't know if they're from the missing plane. The ocean shield will be searching under the water, towing a U.S. Navy pinger locatering like this season. Listening for the beacons on the black boxes. How big a noise does this thing make? You can see the size, in the water, you can't hear it. Reporter: And a U.S. Navy submersible robot to map underwater wreckage and plan how best to salvage it. How long a journey are you preparing for? We're preparing for anywhere up to 45 days. And in a sign that Malaysia is no longer calling all the shots, a retired member of Australia's equivalent of the joint chiefs of staff took command of the task force searching these waters. Time is of the essence now. Not least because the batteries on those black box recorders are running out. For "This week," David Wright, on board the ocean shield, garden island, Australia. And Steve ganyard joins us. Steve we just heard from David Wright. The clock is ticking. And the batteries could run out by next week. This is make or break time. It sure is. If you remember in the past couple weeks down here in the lower search areas, we have been chasing ghosts on satellite images. But in the past couple days, an international body of aviation experts looked at the data and said we think the best place to look is up here in the new search area. It's some 700 miles to the northeast of the old search area. The good news is these waters aren't as rough, the currents aren't nearly as difficult and some of the water is shallower. It's the size of the country of Poland. And really we're back to square one on the search area. And if the black boxes go silent, we may never know what happened. Exactly. And as David Wright just said, coming off of a ship having to transit out here. It will take three or four dice get out there. And when they do their operations, they will work only as fast as a person can walk. Think about that. Searching Poland at a walking pace. We have three to four days before the pinger runs out, time is of the essence.
This transcript has been automatically generated and may not be 100% accurate.