>> they'd probably get them from the commercial world. there are military towed sonar and civilian towed sonar. these assets are in use for industrial purposes and military purposes around the world. but you can get a couple of them in reasonably short order. >> peter, the australian prime minister said earlier that the search -- that they made need to reassess if nothing is found under water after a week of searches. what does he mean by reassess? >> i think they're getting ready to pull back on the surface and the air search. there's a lot of resources being expended there. it's turned up nothing. i don't believe they're going to be cutting back on the under water search that's just begun. they've got to give the bluefin at least six or eight weeks to scan this area, and if that turns up blank, then i think the towed arrays are the way to go because they're going to have to search the length of the arc to try to find where this plane went down. >> are you surprised, peter,