Mark Willacy

People who worked with Donald Trump are speaking to Four Corners as he makes a bid for his second coming as US president.

At stake in the upcoming US election is something Americans once took for granted — and Donald Trump helped take away.

Where Trump’s unfinished wall ends on Jim’s ranch you can simply walk across the border into Mexico. It’s the centre of a political battle that will shape the US presidential election.

ABC journalist Mark Willacy describes the unexpected moment when the Sydney to Brisbane Qantas flight QF520 was forced to make an emergency landing.

The three-year war is in one of its most dramatic and deadly phases, as Russia desperately tries to gain territory ahead of any negotiation.

The national symbol for Australia's fallen soldiers has taken large sums of money from weapons makers, a move former staff call "inappropriate".

Key defence figures on both sides of the Atlantic warn the risks to AUKUS run deeper than whether a review finds it is "America first" enough for Donald Trump.

America’s next mining venture could be deep below the sea’s surface, removing nodules on the seabed full of the metals vital for the green energy transition.  Polymetallic nodules are like golf balls which sit more than four kilometres deep and haven’t been touched for millions of years.  An Australian-born businessman is leading the push to extract potentially trillions of dollars-worth of the material and he has the support of US President Donald Trump.  Today, Four Corners reporter Mark Willacy on the potential and risks around seabed mining and what it could mean for Pacific nations.  Featured:  Mark Willacy, Four Corners reporter

He's been called Australia's Elon Musk. This is his 'trillion-dollar' plan

Inside Parliament House, hundreds of lobbyists freely roam the corridors advocating for corporate interests. Critics say it's a problem.