1. Background to the Crimean conflict. Nice summary by BBC News.
2. Forty-four percent of Mexico's iron ore production is smuggled to China. (Does anybody know how large, or small, is China's real trade balance?)
3. Who is the eurozone's weakest link? Italian banks?
4. Felix Salmon on why bond buyers insist on lending to Puerto Rico under New York's law. It's not what you think.
5. Facebook drones, Google balloons.