Donald Trump has now emerged as the clear front runner for the Republican Presidential nomination. His popularity has reached fever pitch. Matt Frei asks: can Trump really go all the way to the White House? As the race to the Oval Office has heated up the billionaire tycoon has continued to spark indignation, been criticised by the Pope and had his rivals question the size of his genitals. Along the way 'the Donald' has won key states and increased his support while some of his rallies have been consumed by mass protests. His position may now be unassailable, as Trump himself puts it: 'I could stand in the middle of Fifth Avenue and shoot somebody and I wouldn't lose any voters'.
Donald Trump versus Hilary Clinton is on. Matt Frei looks at how this US presidential contest is shaping up to be one of the most brutal in living memory. Clinton says Trump isn't fit for President, while Trump has called for Clinton to be locked up and has even been accused of hinting that she should be assassinated. Frei asks if Trump can really make it all the way to the White House or if he'll be crushed by the Clinton machine. He meets Trump supporters and conflicted Republicans.
Morland Sanders uses hi-tech monitors to investigate hidden pollution hotspots in daily life, and discovers that people can breathe in far more harmful material than official figures suggest. He examines new research indicating that, as well as causing tens of thousands of early deaths through heart attacks and strokes; pollution may damage children's learning ability, and could be a cause of asthma. Plus, experts reveal what needs to be done to keep safe.