CNN Wolf April 18, 2014 17:08:00
Details about its fourth dive, happening last night. it reached 4.7 kilometers beneath the ocean's surface, which is significant, given it was originally thought the upper reaches of its death capacity was 4.5. it had to cut its first mission short due to depth concerns. but engineers analyzed the bluefin- bluefin-21's hardware and they believe it can now go as deep as five kilometers, which is important, given the area they're currently searching is the most probable area they believe they can find the black box based on detailed analysis of the pings. it's important the bluefin-21 is able to...