they've try iangleated it as mu as they do. it's going to go down 14,000 or so feet, move at walking pace. cover about 15 1/2 square miles a day. mapping the ocean floor, looking for any sign of wreckage down there. at that pace, it could take six weeks to two months to cover the entire search area. also that oil slick you mentioned there, they've got two liters of that bringing it back to perth in western australia to analyze it to see if it could be linked to mh-370. and also that search we've been reporting on in sea and air looking for any debris floating on the surface. looks like they're going to wind that back in the next few days. they don't think they're going to find anything. chris, back to you. >> the process is moving forward, does that mean there's been progress? let's bring in david soucie. cnn analyst.