The Wall Street Journal released a short documentary called Behind the Glass to commemorate the 10-year anniversary of the iPhone’s release on June 29, 2007. The almost ten-minute long documentary cuts between interviews with Greg Christie, former Vice President of Human Interface, Scott Forstall, former Vice President for the iPhone Operating System, and Tony Fadell, former Senior Vice President of the iPod division. The three describe the struggle over whether to base the iPhone’s hardware on a multi-touch interface versus the iPod and the ensuing 2.5-year effort to create the first iPhone.

The interviews are short but recount several anecdotes, including the attempts to find a way to adapt the iPod’s interface to work as a phone and the predictive software used to make the touch keyboard accurate. Even ten years later, the retelling of the stories behind the iPhone’s birth is captivating.