The US President wanted to know how Malcolm Turnbull had been removed from office.
The official agenda in Buenes Aires is development,infrastructure and food security. But it's the meetings on the sidelines where the real action happens.
Australian and US officials are working on plans to secure the bilateral meeting between Donald Trump and Scott Morrison at the G20 summit,after the US president cancelled planned talks with Russian President Vladimir Putin.
The “baby Trump” highlights the strong views of those who hate the G20 – so strong,in fact,that Donald Trump is regarded as a more malevolent leader than any of the others at the summit.
Protest groups have been warned sonic cannons could be used against them should their G20 demonstrations get out of hand.
US President Barack Obama's penchant for speaking to young,future leaders looks set to continue in Brisbane,with the University of Queensland firming up as the venue for a landmark presidential speech.
Queensland police have made their first G20-related arrest,with a 57-year-old man charged after taking photos at the Brisbane Convention and Exhibition Centre,which will host next week’s leaders’ summit.
Brisbane residents appear to have ignored pleas from the city's Lord Mayor to remain in Brisbane during the G20.
With two weeks to go until Brisbane becomes the de facto capital of the world,albeit for a single weekend,preparations and celebrations were held across the city.
Brisbane businesses set for a financial hit due to the Friday G20 public holiday should look at the bigger picture and long-term benefits,organisers say.
A month out of the biggest peacetime security operation in Australian history,G20 organisers have been made aware of 21 protests planned for Brisbane.