What is the meaning of the barriers mankind chooses to erect? Are they an ultimate dead end, a challenge to be transcended, or a reality to be contemplated? Obstacle is Johnston’s latest and boldest statement about how far one can stray from the more conventional and expected subject matter of photography to create striking photos of compelling originality. Despite progress, why does humanity seem to run into a wall, usually of our own making? Can we break through, or are we doomed to make the same habitual mistakes? How can the individual overcome the things that stop us in our lives? In Johnston’s images, the answers are both suggested and yet teasingly elusive, for one is never sure whether the curtain is rising or falling.