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Technological advances have been on display in the war in Ukraine, from hypersonic weapons to naval drones. But Ukraine is also making use of an 18th-century technology: the humble balloon. Read how it is helping the country strike deep within Russian territory.
And Kevin Warsh is more tight-lipped than his predecessors about where he thinks interest rates are headed. But at Jackson Hole central bankers are expected to explain themselves. On Friday Mr Warsh offered a clearer account of how he thinks about monetary policy. Markets liked that.
Finally, have you been following the headlines this week? Test your knowledge with our Friday news quiz. | 
