Just wanted to put this here for reference. The European hornet, which has been in the US since 1840, is very similar looking to the Asian yellow-legged hornet. European hornets will come and catch flying bees out in front of colonies, but they don't exhibit the "hawking" behavior of the Asian hornet, which can be so destructive to European bee colonies.
Note the drippy pattern on the European hornet, which is absent on the Asian hornet.