Someone just snuck warrantless email access into the Senate's secret intelligence bill

Every year, the Senate passes a secret bill (that is, a bill whose text is a secret during its debate) that re-authorizes intelligence agencies' surveillance powers; this year, someone (possibly chairman Richard Burr, R-NC and/or Tom Cotton, R-AR) has snuck in an amendment that would give the FBI the power to demand warrantless access to Americans' email and browsing history, using National Security Letters, a controversial, widely used secret police order. (more")