As the US launches a review into AUKUS, Four Corners examines the future of the $368 billion submarine deal. Reporter Mark Willacy and the Four Corners team travel to Washington, DC to speak with key players inside the Congress and the defence community. One former Trump Defense Secretary says the program is moving too slowly. Now, the Pentagon is reviewing the entire AUKUS deal with fears it might not align with the new administration's "America First" policy. In London, senior UK figures also sound the alarm. They warn of cost blowouts and delays in building the new AUKUS-class nuclear submarine with Australia. Submerged asks the tough questions about what happens to Australia if Donald Trump decides the AUKUS deal doesn't serve America's interests – leaving Australia out of pocket and stranded.

Four Corners dives into the chaos created by Donald Trump's trade policy.

Reported by Steve Cannane, Trading in Chaos investigates how the very people the president set out to help are now being harmed.

From soybean farms in North Carolina to toy warehouses in Texas, from the ports of New York and New Jersey to the rust belt of Pennsylvania, Steve and the Four Corners team have crisscrossed the US to talk to those most affected by the tariffs.

The film captures the confusion, uncertainty and fear generated by Trump's whiplash-inducing tariffs, policies that experts say will increase the cost of living, make the US poorer and the world a less prosperous and secure place.