we sent nick kwek to find out more.occasionally... ..sharks. last year, there were 15 unprovoked attacks on australian coasts and just this week, two surfers were bitten by the fearsome predator. patrolling the gold coast since last summer, westpac little ripper drones have been surveilling for sharks and alerting lifeguards and swimmers. they work with a custom piece of artificial intelligence software called the sharkspotter, which is scarily effective. we have more than 90% accuracy with sharks. a trained human operator flying on a helicopter has accuracy around 20—30%. 90% accuracy! the programme uses object recognition to identify and decipher between people and marine life, and it gets smarter as it goes. we have to draw boxes around each of the objects and say what kind of, or what type of object is that. it has to be done — it is a manual process. how long does that take? well, it takes a long time. we have to edited manually more than 20,000 frames and use it for training and testing. once a shark is detected,

nick kwek there, working as hard as ever. that's it for the short version of click.nd rachel burden. social media giants are accused of turning a blind eye to their impact on children. the government threatens to introduce new laws and orders a review into the effects on young people's mental health.

nick kwek there, working as hard as ever. did it with a short version of click.ile tests and announces its to shut down a nuclear test site. president trump has welcomed the move. he calls it "good news for the world." good morning. it's saturday, 21st april. also this morning: police have arrested a man wanted in connection with a burglary in south east london during which one intruder was fatally stabbed. the prime minister promises to do whatever it takes to help the windrush generation including paying compensation.