August 29, 2014 -- Updated 2302 GMT (0702 HKT) Edited by Simon Rushton in Atlanta

Russia's Vladimir Putin issues a defiant message, reminding the world it is a nuclear power, as a British source tells CNN there's up to 5,000 Russian troops fighting in Ukraine.

Russian advances in Ukraine mean diplomacy has failed and the world is heading for an era of confrontation, a regional experts says. FULL STORY

OPINION
A military expert shows how air power can hit ISIS bases -- and suggests other likely targets.
CHILD ABUSE SCANDAL
The sex abuse of hundreds of children has shocked a nation. How could it happen?
GIRL WITH AN UZI
Daughter of a man killed by a 9-year-old girl learning to fire an Uzi says: "My heart goes out to her."
Are we looking at a future where appliances float free through levitation?
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