The negative vote in Britain’s Parliament was a heavy blow to Prime Minister David Cameron, who had pledged his support to Mr. Obama and called on lawmakers to endorse Britain’s involvement in a brief operation to punish the government of President Bashar al-Assad for apparently launching a deadly chemical weapons attack last week that killed hundreds."With the use of the word 'apparently' – rather than directly attributing the administration, The Times seems to take the government’s position at face value."
ADDED: The quoted sentence is bad for another reason. There's way too much happening in that sentence ,and phrases end up saying things that are not intended and that we're supposed to straighten out in our heads. Specifically, Cameron didn't call for punishing Assad "for apparently launching" the attack.
Cameron called for punishment for launching the attack, which Cameron believes happened. You only impose the punishment if you're satisfied that the thing deserving punishment happened. It's a separate issue whether it happened. The writer of the sentence and the editor who accepted it realized they don't know, so they wedged "apparently" into the sentence.
That's a type of error that you see all the time, often with the word "allegedly," as in: "John Smith was charged with allegedly murdering Joe Blow." No! Smith was charged with murdering Blow. Whether he did it or not may be in question, but the charge is murder, not alleged murder. You could say that it is alleged that Smith murdered Blow, but no one is charged with alleged murder.
Quite aside from the problem of journalists psychically merging with the government, there's flat out bad writing. Write better sentences that say only exactly what you know. Words like "allegedly" and "apparently" can help, but pay attention to where you put them and whether you're creating new, unintended inaccuracies.