stopwatching.us's letter to Congress is based on the premise that the Guardian and WashPo articles are true. Of course, Google and others are swearing that it's

stopwatching.us's letter to Congress is based on the premise that the Guardian and WashPo articles are true. Of course, Google and others are swearing that it's false. So why would Google want to sign that letter? This also assumes that a letter like this does any good. I would think that Google actually filing a legal challenge with FISA is going to be more effective.