This was my longest trip to Italy and hence the longest photo essay, over 5700 words, a half-hour read. You can scroll through the 120 photos quicker. May 14-28.  PAVIA, BERGAMO, BELLAGIO, & STRESA. After saving Delta miles for years, I finally had enough (390,000) for a business-class ticket to Milan. (Rome required 450,000 miles).…