Reuters news agency releases a video showing what appears to be a rescue worker holding up an in-flight recorder, often referred to as a black box, at the crash site. The agency labels the video as being of one of the two flight data recorders from flight MH17. Reuters says the video was taken two days ago. It is unclear who is in possession of the black box at this time. The data contained in the black box will be crucial in determining what happened on the plane moments before it was shot down.