Most of you are aware what Red Flag is. For the benefit of those who don't, it is a realistic air-warfare exercise thats run in Nevada and Alaska hosted by the USAF. Several air forces are invited to take part in these exercises in order to foster cooperation with US air forces after experiences in the first Gulf War highlighted a need for US allies to be able to be on par or keep up with US air operations.
Singapore is one of the participants.
http://www.youtube.com/watch?v=N9S-BvFx9Gk&feature=related
At about 4.30 into this video, you should see a very familiar arm patch being worn by some ground crews in blue. =)
Feel free to check out the rest of this series of video on Red Flag. An important thing to note is that Red Flag at Nellis usually only invites air forces that the US considers to potential coalition partners in conflicts.