Washington dinner shooting suspect pleads not guilty

A man charged with attacking the White House Correspondents' Association dinner in Washington DC has pleaded not guilty to federal gun crimes and attempting to assassinate the US President. Prosecutors allege the man attempted to storm past a security checkpoint and fired a shot at a US Secret Service agent, who was saved by his bullet-proof vest. The man's lawyers have requested the judge to disqualify US attorneys in the Washington office from participating in the case.