By JOHN L. ALLEN JR.
Summer 2008 is chock full of Catholic anniversaries, from the 40th birthday of Humanae Vitae to the 30th observance of the death of Pope Paul VI. One such milestone, however, does not appear on any official church calendars: it?s now been 25 years since the June 1983 disappearance of Emanuela Orlandi, a 15-year-old girl and Vatican citizen whose fate has become one of the most enduring Vatican mysteries of the 20th century.