In this series 'The full picture', award-winning photojournalist Rick Findler shares the stories behind the photographs.

Rick talks about one of his most recognisable images - a picture of Free Syrian Army rebels using a make-shift catapult to fire missiles over a wall toward Assad troops. With never-before-seen video footage, Rick takes you on a journey of just how this picture came about.

This is the seventh in an eight part series, to watch the other videos visit the playlist 'The Full Picture' or set up your notifications so you never miss an episode.

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