The top Democrat on the House Oversight and Government Reform Committee says the NFL players' union "is now holding HGH testing hostage" and that could "force Congress to intervene."FILE - In this July 18, 2011, file photo, NFL Players Association spokesman George Atallah pauses as he speaks to the media in Washington, as talks to end the NFL lockout continued. Thursday's latest public back-and-forth, featuring NFL Senior Vice President Adolpho Birch and Atallah, comes exactly two weeks before the first game of the 2013 regular season.FILE - In this May 25, 2010, file photo, Adolpho Birch, NFL Vice President of Labor Policy and Player Development, responds to a question during a news conference at the spring NFL football meetings in Irving, Texas. Thursday's latest public back-and-forth, featuring Birch and NFL Players Association spokesman George Atallah, comes exactly two weeks before the first game of the 2013 regular season.