In the difficult search for missing Malaysia Flight 370, the Bluefin-21 scans the ocean floor for clues. But even getting the equipment into the water poses certain challenges.
Wind can dictate what side of the boat the Bluefin-21 is lowered from, fearing that a gust could send the delicate instrument crashing into the side of the boat.
Wave heights and strong currents on the surface of the ocean can also impact the deployment.
Indra Petersons explores these obstacles that searchers face in their efforts.
CNN's Martin Savidge shows us the inside of a submarine as the search for MH370 continues under water.
"I would say the front seat of my Ford Focus would have a little more room for all of us," Savidge jokes as he describes the conditions inside the vessel with a crew of four.
Here are some behind-the-scenes photos from his Instagram account:
Sanctions imposed against Russia are working as a deterrent, President Barack Obama and other White House senior administration officials said Wednesday in a detailed defense and explanation of the U.S. response to the escalating crisis in Ukraine.
And new sanctions could be imposed as early as Friday, with key Putin allies, institutions and top oligarchs among the targets, other senior administration officials said.
Obama told CBS News Wednesday that the current sanctions are hurting Russia’s economy and will have negative long-term consequences.
“What I’ve said consistently is that each time Russia takes these kinds of steps that are designed to destabilize Ukraine and violate their sovereignty, that there are going to be consequences,” he said. “And what you’ve already seen is the Russian economy weaker, capital fleeing out of Russia. Mr. Putin’s decisions are not just bad for Ukraine, over the long term, they’re going to be bad for Russia.”
Senior administration officials are in Brussels coordinating the rollout of the new sanctions with European allies. All parties are waiting for the results of talks set for Thursday involving Russia, Ukraine, the United States and the European Union. Secretary of State John Kerry is representing the United States in those talks in Geneva. Expectations for a breakthrough at the talks are low.
White House officials now say that sectoral sanctions – those that cut off a portion of the Russian economy – will not be enacted unless Russia attempts a full-on invasion of Ukraine. Last month, Obama signed an executive order giving the United States the power to impose such sanctions.
Anguished relatives of missing South Korean ferry passengers waited sullenly for answers Thursday as rescuers fought bad weather, murky water, darkness and time to find a way deep into the capsized ship.
Authorities believe 287 people - many of them high school students on a field trip - remain trapped inside the five-story ship. At least some, authorities say, could still be alive more than a day after the ship rolled over.
Meanwhile, the ferry's captain is facing mounting questions about the incident.