We made it! We had more than three hours at Heathrow’s Termical 5 before the flight back to Seattle -but the experience at Heathrow was a good one. Everything works well and the security check point was efficient and not nearly as onerous as the ones here in the States. After arriving at Seattle airport, it took more than an hour to get through passport control at US Customs. And there was more waiting at the taxi stands : the lines were very long. So we opted for the light rail train from the airport to Mount Baker station where our friend Steve came to pick us up. Thanks Steve!