The US Chamber of Commerce has sued the Yes Men, after the political pranksters impersonated the organization. The Yes Men staged a fake press conference at the National Press Club last week to announce that the Chamber was changing its stance on climate change and supporting capping greenhouse gas emissions. Several news outlets, including Reuters, CNBC and Fox Business Channel, reported the policy change as fact before issuing corrections. The Chamber is suing the Yes Men for misappropriating its logo and violating a host of related copyrights.