Amendment Banning La. Gay Marriage Tossed By ADAM NOSSITER, Associated Press Writer BATON ROUGE, La. - A state judge Tuesday threw out a Louisiana constitutional amendment banning gay marriage, less than three weeks after it was overwhelmingly approved by the voters. District Judge William Morvant said the amendment was flawed as drawn up by the Legislature because it had more than one purpose: banning not only gay marriage but also civil unions. Michael Johnson (news - web sites), an attorney for supporters of the amendment, said he will appeal the ruling. A gay rights group challenged the amendment on several...