Tense relations between two historic allies have taken a turn for the worse. A significant trade action has been taken, affecting a substantial amount of products. The value of affected goods is $20 billion.

A steep tariff of 50% is being imposed. This move follows unsuccessful negotiations. Further information on this development is available from the source.

Details of the retaliation planned by the affected country are also noted, but specific actions have not been outlined in the information provided.