What a mysterious pipeline attack says about European unity

When segments of the Nord Stream gas pipeline linking Russia to Europe mysteriously exploded last September, all eyes were on Moscow, Ian Bremmer tells GZERO World.

But proving a wide held suspicion that Russia was responsible has been a much harder task for European nations.

That's in part due to a long European history of reluctance to share intelligence among member nations.

For a continent that has coalesced around supporting Ukraine during its war, the reluctance to work together on investigating the Nord Stream explosion is raising more than a few eyebrows.

Watch the GZERO World episode: Europe’s tough decisions: Russia, China, and EU unity