Transcripts for CNN CNN Special Report 20140407 03:00:00 : v

we re going to be here for a long time this evening because a lot could happen between now and midnight. a lot may happen after that once we do hear from the man in charge of this investigation. we don t know what he is going to say. but he has called a news briefing to be held in just about one hour from now. welcome, everyone, to a cnn special report, mystery of flight 370. i m don lemon. the joint task force heading up the search for missing flight 370 has just announced a news conference. this unplanned briefing is set to take place at midnight eastern time, in just about an hour. and we re going bring that to you live. so right now, though, we want to talk about for the first time we have what could be the sound from the plane s black box. search crews are scouring the indian ocean, trying to find out if there is anything to the pings that they heard this weekend from chinese ships, from a chinese ship. a specially equipped ship that