Feb 14 (Reuters) - Yevgeny Prigozhin, the head of Russia's Wagner mercenary group, said on Tuesday that he founded and financed and the Internet Research Agency, a company Washington says is a "troll farm" which meddled in the 2016 U. Prigozhin, an ally of Russian President Vladimir Putin, spent years operating on behalf of the Kremlin in the shadows, but has emerged in recent months as one of the most high profile figures connected with Russia's invasion of Ukraine. See here for a complete list of exchanges and delays