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Parts of Sydney are in lockdown as Australia battles the most transmissible strain of COVID-19 yet. The Delta variant, which was first detected in India, has been identified in at least 80 countries, and is fast becoming the dominant strain across the world. What do we know about it? And how does it change our fight against the virus?

In Sydney's COVID outbreak, there's a snowballing list of exposure sites, but no lockdown has been imposed yet; And a frantic search in Miami as rescuers comb through the rubble of a collapsed apartment block.

The Sydney COVID outbreak has taken an alarming twist, The Nationals attempt to rewrite the Murray Darling basin plan, And cyber criminals posing as bank employees to steal millions from Australians.

There's concern the New South Wales COVID cluster has spread across the Tasman.

Australia has been shocked by a recommendation from a key international body that the Great Barrier Reef be listed as "in danger", meaning it could lost its world heritage status;

Deputy Prime Minister Michael McCormack is staring down a possible leadership challenge from his predecessor, Barnaby Joyce;

The national vaccination campaign has been thrown into chaos again, after the government said that AstraZeneca's vaccine is only safe for the over-60s. That brings Australia into line with many other countries, but our supplies of alternative vaccines are low. What does this latest change do for confidence, and the speed of our rollout?

How does the Federal Government convince people to keep getting vaccinated despite another change in the national rollout?; And what changes to superannuation laws mean for you.

The Afghan Province where Australian troops fought at risk of falling to Taliban

The Prime Minister has flown to Paris for talks with the French President after signing a free trade agreement with the UK