because of the different levels of ash density, airlines can still apply to fly in some places. a british airways plane made a test flight on tuesday, b.a. says it's expecting to operate normal flights today. in iceland, the grimsvotn volcano is calming down. officials in the country are saying that the eruption itself is almost over. let's get more on the situation in germany, where it's not over yet for so many travelers. fred platkin is at cnn in berlin. fred, how long are the airports going to be closed and how long are travelers going to wait? >> reporter: zain, for some travelers, the nightmare is just beginning. two berlin airports, among the largest in germany, just shut down a couple of minutes ago, the airspace closed at 11:00 a.m. local time. which indeed happened a couple of minutes ago, hamburg and bremen airports remain closed since the early-morning hours. 600 flights will be canceled throughout germany today. there will be a lot of very