Mumbai, Sept 28, (ANI): Known for showcasing the best of knowledge and entertainment through their programming, National Geographic Channel has announced actor-producer John Abraham as the face of the channel. Through this association, the channel has also launched a new campaign aptly titled 'Unlock'. The 40-year-old star, who is a fan of the channel's action-packed content, expressed his happiness to be a part of the campaign. The essence of this campaign is to open the doors of the mind, and is clear by its tag line that is- "it's the time to 'Unlock'."