>> the u.s. has given denmark approval to transfer f-16 training materials there, a critical step that allows ukrainian fighter pilots to begin training, which kyiv has repeatedly requests this year. nick paton walsh has more. >> reporter: some suggests that we may be seeing programs to get f-16s to ukraine may be sped up a little after the last 48 hours. denmark saying they will begin training for the pilots in the next 13 days possibly or so. the netherlands also on board with that. it was european allies of ukraine that will be doing the training in europe. after that, the americans would assist in the supply of jets to ukraine. it's a complex situation because the americans had to sign off on the training equipment. all that paperwork appears to be dealt with now and they're moving forward.