Reps. Edward Markey (D-MA) and Joe Barton (R-TX) have written to Facebook CEO Mark Zuckerberg following an investigation into third-party apps sharing user IDs with advertisers, MSNBC reports. "Given the number of current users, the rate at which that number grows worldwide and the age range of Facebook users, combined with the amount and the nature of information these users place in Facebook's trust, this series of breaches of consumer privacy is a cause for concern." They have asked how many users were affected by the leak, when Facebook became aware of it and what it plans to do about it. Facebook has issued a statement that it will work with the legislators to answer their questions.
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