Maybe it's a sticker for "o1" visa holders in the US
Quote:
The O1 visa is a non-resident US visa for people who demonstrate extraordinary ability in their field, whether that be the arts, sport, business, education, or the sciences. The O1 could be considered the non-resident equivalent of the EB1-1 ( the “Extraordinary Ability Green Card”ť, which gives permanent residency).
... and the rocket engineers signify how this visa "rockets" people outside the US to succeed?
Just a thought