Fighter jet purchase: Secret clauses are said to give the USA special rights.The USA can refuse delivery without compensation.But the contract has its pitfalls, as "Stern" now reports. The magazine has the contract documents, according to a report. One of the clauses: "The US government reserves the right, in the event of unusual and compelling circumstances, if the national interest of the USA so requires, to terminate or suspend the provision of services in whole or in part at any time." In the event of a crisis, US President Trump could therefore stop the delivery of the jets. And even if the fighter jets are finally in the hands of German pilots, the USA can cancel a launch.The Foreign Assistance Act allows the US to "monitor the end-use" of the F-35, namely "all" uses, as the agreement states, according to Stern.