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Now Playing: 04-03-12 Marketplace Mid-day Update

Car manufacturers report sales numbers for last month today, and one thing that might have hit them hard is gas prices. Next week will mark 100 years since the maiden voyage of the RMS Titanic, and we speak to Robert Ballard, who discovered the Titanic wreck in 1985, about the state of deep sea exploration these days. If you're a regular user of Facebook or Twitter, you're likely familiar with the KONY 2012 video -- and now, the group behind it is preparing Kony 2012, Part 2.