"We built the iPhone for you, our customers," Cook said today. "And we know it is a deeply personal device. ... We need to decide, as a nation, how much power the government should have over our data and over our privacy."

Cook said that Apple owes it to the United States itself to protect citizens' data. This builds on previous arguments Cook has made against the FBI's demands: He's previously called the order to unlock the iPhone 5c "unconstitutional" and "bad for America."

On the flip side, the Department of Justice has called Apple's rhetoric in this case "corrosive."

Get all the news from today's iPhone event right here!