The future of collective security
President Donald Trump warmed to Nato at its 70th anniversary summit, but tested diplomacy. Despite fears about the alliance’s future, it remains a guarantor of peace and even the US needs friends. Here’s the best of this week’s opinion and analysis.
![UNDATED FILE PHOTO - File photo of fuel tanks at the edge of a Military airstrip on Diego Garcia, largest island in the Chagos archipelago and site of a major United States military base in the middle of the Indian Ocean leased from Britain in 1966. Exiled inhabitants of Diego Garcia began a challenge July 17 to a British government decision to kick them off the remote island 30 years ago to make way for the U.S. base. [Thousands of islanders from the 65-island Chagos archipelago, many of them born in exile in Mauritius, want Britain to return them to their homeland]](https://www-ft-com.ezproxy.cul.columbia.edu/__origami/service/image/v2/images/raw/http%3A%2F%2Fprod-upp-image-read.ft.com%2F012fa672-12e5-11ea-a7e6-62bf4f9e548a?source=next&fit=scale-down&dpr=2&width=340)
