If Qantas flight 755 descended below 20,000 ft, an on-board bomb would detonate - in 1971 the authorities were forced to choose; pay a ransom, or else. This is the forgotten story of one of Australia's most audacious heists.

In July 1979 NASA assured the world their crippled space station would crash harmlessly into the ocean. Instead, residents of Western Australia woke up one morning to find space junk strewn across their state.

Ronald Ryan was sentenced to death after being accused of killing a prison warden during his escape from Pentridge in 1965. It galvanised support for the abolition of capital punishment across Australia.

A massive land and sea search swings into action within hours of the PM's disappearance, while ABC crews on the ground provide up-to-the-minute reporting in this early example of rolling news coverage.