Portugal ruled out replacing its U.S.-made F-16 fighter jets with more modern F-35s because of Donald Trump - in one of the first examples of the U.S. president killing a potential lucrative arms deal. The country's air force has recommended buying the jets, but the outgoing defense minister said "the predictability of our allies" must be taken into account when making procurement decisions. With the dramatic realignment taking place under Trump - who said again today he would annex Greenland and threatened Canada - there are fears the U.S. government could decide block access to software updates and spare parts needed to make the F-35 fully operational.