US President Barack Obama discussed a possible military intervention in Syria with British Prime Minister David Cameron on Wednesday morning, the BBC reported.Citing a Downing Street spokesman, the BBC reported that both leaders agreed a chemical attack in Syria had taken place, perpetrated by Syrian President Bashar Assad."The Prime Minister confirmed that the government had not yet taken a decision on the specific nature of our response, but that it would be legal and specific to the chemical weapons attack," the spokesman told the BBC.