Apple CEO Tim Cook on Monday reiterated the company’s opposition to helping the feds access its products, and called for a commission to study the issue of encryption.

“Our country has always been strongest when we come together,” Cook said in an internal email to employees Monday. “We feel the best way forward would be for the government to withdraw its demands under the All Writs Act and, as some in Congress have proposed, form a commission or other panel of experts on intelligence, technology and civil liberties to discuss the implications for law enforcement, national security, privacy and personal freedoms. Apple would gladly participate in such an effort.”