I'm partial to real helmets. These collars would be too warm in summer, and in winter I want something on my head (I even tape up my holes in the helmet these days biking to work, 8F wind chill this morning...)

here's one I just found, although not really current news any longer, just cool to look at:

Shuttle Endeavour: A piece of space history flies by in slow motion

Same guy shot this test footage a few hours earlier, which is the cooler video - the temperatures went way up for the shuttle landing above, but here it is just perfect. I'm sucker for long lens slo motion shots

Shoulda, Woulda, Coulda Beenů.