 Complete the following phrase:  Nick T. Spark is an American documentary filmmaker and writer. Films he has written, directed or produced include  2001 the Emmy award-winning The Legend of Pancho Barnes and the Happy Bottom Riding Club 2009 and Right Footed 2015. In addition to being a contributing editor to Wings and Airpower magazines, his articles have appeared in the Annals of Improbable Research, Naval History, the Journal of the American Aviation Historical Society, and Proceedings. People he has interviewed include President Gerald Ford, British Prime Minister Margaret Thatcher, Secretary of State Colin Powell, disability activist Jessica Cox and numerous test pilots including Charles Chuck Yeager. In 2007 Spark was interviewed on National Public Radio, concerning an article he wrote about the 