Why everyone's wearing NASA-branded clothes

On any given day, a thirty minute walk around New York City can yield at least a few NASA logo sightings.

Once you start noticing them, it's hard to stop.

There have been several trend pieces about the phenomenon in recent years. And NASA's multimedia liaison, Bert Ulrich — who oversees the use of NASA logos in film, TV and on apparel — confirms the demand for NASA branded apparel is far from petering out, at least based on the number of logo deals he's been approving. He's been in his role for more than two decades, so he's seen the trends ebb and flow. (Mostly flow)