Gatwick Airport morning of 9/1/01, we were flying to Greece on holiday and were next to a Gate for a New York flight. Young woman, in tears, travelling alone with a baby and a grizzly toddler who was playing up. I played peekaboo with him for a while until our flight was called.
The atrocity happened while we were in the air and i assume she ended up being grounded somewhere with her children.
I flew to relatives abroad a lot when mine were little and often think of her.