The deaths of two C.I.A. officers in a crash in northern Mexico sparked questions about authorization and sovereignty, but also reflected a longstanding, sensitive security partnership between the two countries.

The U.K. government has become the latest jurisdiction to introduce a lifelong ban on smoking, as its Tobacco and Vapes Bill has cleared Parliament and now needs only royal assent to become law. Here's what to know. Read More

The proposal, which was approved by Parliament on Tuesday, will ban the supply or sale of tobacco products to anyone born in 2009 or after, permanently.