An earlier version misstated the location of Turkey's border with Syria.
An earlier version of this story misstated how much warmer the planet is today than it was in pre-industrial times.
An earlier version misstated Putin's quote. He said the jet downing was a "stab in the back."
An earlier version had the wrong first name for Adam Ely.
Correction: S&P 500 had its best week since last December, not October.
Correction: This story has been updated to reflect that the S&P 500 had its best week since Dec. 19, 2014, not October.
An earlier version misspelled the last name of Diane Greene.
This report has been updated to reflect that the app was launched by XOPO in partnership with Xpress Money.
This version corrected the hyperlink to Foot Locker's stock price.