How does the author use foreshadowing in Patriot Games?

In Chapter One, Clancy uses a very clever opening gambit for Patriot Games. "Ryan was nearly killed twice in half an hour." Page 11. This opener sets the stage for drama, and then eases the reader into the story with a touch of humor about cars on the wrong side of the road in London. The reader is led through a peaceful and beautiful late afternoon in London, being lulled into a false sense of well-being. Just as the happy family unit comes together, a horrible explosion interrupts the contented feeling established in the beginning of the story. This leads the reader immediately to one of Clancy's recurring themes in the story of how good solid family values are at risk at the hands of terrorists. This is clever foreshadowing that will be revisited numerous times throughout the story.