This story was revised to correct Spicer's first name.
A previous version of this story said Nadella has been CEO for two years.
This story was revised to provide the correct translation of Slim's remarks. He was referring to a united Mexico.
This story was revised to correct the day of the announcement.
Correction: A previous version of this story misspelled the last name of New Relic's CEO.
The Dow closed at 18,024.17 on Dec. 23, 2014. An earlier version misstated the figure.
This story has been corrected to reflect a change in Nielsen's spending estimate, which had been previously misstated.
The headlines on this story were revised to clarify that the missile was not armed.
This story was revised to show that net sales increased 0.4 percent to $7.33 billion.
This story was revised to delete an outdated reference to Trump's status.