I flew Delta One on a 9-hour overseas flight. Here's what surprised me about the business class seat.

• I flew Delta One on a nine-hour flight from Europe to the US. • The seat was luxurious, but my journey came with some surprises. • Security went differently than I anticipated, and I loved the hidden amenities in my seat.

After spending a dreamy week in Europe in August, it was time to fly home to New York.

I booked a flight from Brussels to Atlanta with a connecting flight to John F. Kennedy International Airport in New York, so I'd have a nine-hour flight plus another two-hour flight.

Luckily, though, I wasn't dreading the overseas flight too much because I was flying Delta One.

Delta One is the airline's business-class seat on long-haul flights, offering lie-flat seats and a host of other amenities. I've flown Delta One once before, from New York to San Francisco on my honeymo