This story was revised to correct that Taylor Swift's performance can be seen across all of AT&T's video platforms.
Ed Wasserman, dean at U.C. Berkeley's Graduate School of Journalism, says he misspoke in an earlier version of this article. It was updated to clarify that hate speech is not, on its own, illegal.
This story was revised to correct that the Trump conversation with Pena Nieto was Jan. 27.
This story has been revised to correct the network airing the game and that a 60-second ad costs about $10.4 million.
This story was revised to correct that the $90 million spent by WPP's clients represents nearly a quarter of Snap's 2016 revenue, not of the amount Snap spent on ads.
An earlier version of this story misstated the names of the international teams competing for the Air Force's next generation trainer. The teams are Sweden's Saab and Boeing as well as Lockheed Martin and Korean Aerospace.
This story was revised to reflect the value of exports from Mexico to China.
The AK-47 is a semi-automatic rifle. An earlier version mischaracterized it.
Trump signed an executive order for a travel ban on Friday. An earlier version mischaracterized the action.