How does a classified program get revealed from an unclassified source? What does that mean? A program is either classified or unclassified, by definition it can't be both.
There are always reports and summaries produced for people who are not cleared. This story appears to be drawn from a series of reports about management problems written for the accountants at the Pentagon.
My guess is that the "defense experts" cited in the story do not actually know very much about the program.