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The Cipher Brief curates open source information from around the world that impacts national security. Here’s a look at today’s headlines, broken down by region of the world.

Open Source Report for Friday, March 28, 2025

Report for Friday, March 28, 2025

U.S. Seeks to Control Investment in Ukraine, Squeezing Out Europe

Putin suggests a temporary administration for Ukraine to end war

Canada’s Carney says old U.S.-Canada relationship is ‘over.’

Vance to visit Greenland, the island Trump wants to control

Iran responds to Trump's letter, expresses readiness for indirect talks

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