Officials say the terrain of western Nevada's high desert is making the search for Steve Fossett especially tough.
Crews will return to the skies today over a greatly expanded search area, with little clue of where Fossett and his plane might be.
But one Nevada National Guard member tells NBC's "Today" show that there a lot of "places for people to hide" because there are lots of deep ravines.
She says considering the terrain and size of the search area, it's not uncommon to not have any clues at this point in the search. But she says crews "will turn up something."
Fossett has been missing since Monday, when he took off from a private airstrip southeast of Reno. He did not file a flight plan.