The first class thing is about another incident but involving a Delta flight this time.
From the link above:
This was the second such incident involving a North American flight on Thursday night.
Officials say a Delta Airlines flight bound for Beijing returned to Seattle-Tacoma International Airport after a passenger assaulted a flight attendant.
Airport spokesman Perry Cooper says a man in first class assaulted a flight attendant about 45 minutes into the flight and that passengers then helped restrain the man until the plane landed back in Seattle.
That's my understanding anyway....