Ukraine is using data derived from Russian smartphones to target missile strikes. Smartphones, as well as social media, are transforming battlefield intelligence. 

Its announcement, which follows years of scrutiny from privacy advocates and regulators, is not as benevolent as it appears.

With the twentieth anniversary of the September 11, 2001, attacks this Saturday, we recommend sources for better understanding 9/11 and its aftermath. Today: seven movies about 9/11.