If you have traveled or studied abroad, chances are that when you least expect it you will run into someone—a former classmate or colleague, a teacher, or a friend of a friend—on a holiday, at a conference, at a wedding, or even on the street. Time has passed, and, of course, you have a lot to catch up on. There are so many experiences you have to share, so many stories you’d like to tell, and so many questions you’re anxious to ask.