*puts libel lawyer on speed dial*
Only kidding!
"Facebook doesn't track you" he says, in a reassuring message sent to TV screens, tablets, mobile phones and baby monitors worldwide.
"Sure" says Zuckerberg. A minion hands over a briefcase full of unmarked bills to the Senator.
Zuckerberg: "Other than shared staff, zillion-dollar contracts, and people on the Facebook board, absolutely nothing".