Morning Mail: new wave of climate refugees, Westconnex feature, Syria 'chemical attack'

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Guardian Australia's Morning Mail Wednesday 5 April 2017 g Nasa's Saturn explorer to self-destruct after 20 years Good morning, and welcome to the Morning Mail. Among the stories on our website this morning: after 22 orbits between Saturn and its rings, Nasa plans for the Cassini spacecraft to "break apart, melt, vaporize and become part of the very planet it left Earth to explore". Cassini will end its 20-year journey with humanity's closes ever look at what goes on in Saturn's rings and within its clouds. Keep reading for the rest of the top stories this morning, with more news from around Australia and the world.

Headlines 'Disaster alley': Australia could be set to receive new wave of climate refugees US defence expert warns people fleeing low-lying Pacific islands a precursor to 'climate-exacerbated water insecurities' that could trigger wider conflict WestConnex: bitter battles mark the road to Australia's urban future The controversial 33km road and tunnel project in the city's inner west has become a litmus test for Australian urban planning The state has let millennials down. That's why we crowdfund basic needs The trend for millennials to support each other through crowdfund schemes shows how community conscious we are, as well as the anxieties we live with Syria: suspected chemical attack kills dozens in Idlib province Doctors say victims from attack on Khan Sheikhun were bleeding from the nose and mouth, had constricted irises and suffered from convulsions Labour suspends Ken Livingstone for another year over Hitler comments Critics claim relations between Labour and Jewish community are at 'new all-time low' as former London mayor avoids permanent expulsion Australian news and politics To bring Sydney together, WestConnex tears suburbs apart – video The New South Wales government promises that Sydney's $16.8bn WestConnex motorway project will dramatically ease the city's dire congestion problems, but critics say it is a damaging waste of money Sydney's WestConnex changes the face of St Peters – in pictures A collection of images shot around one of the main construction sites for Sydney's $16.8bn WestConnex road and tunnel project. The photos tell a tale of significant infrastructure development, lost trees and the removal of families from their homes Open letter urges Malcolm Turnbull to deliver energy market reforms John Hewson and Simon Holmes à Court join Australia Institute's call for changes to lower prices and emissions and improve security National security community should put diversity to work, Penny Wong says Labor's foreign affairs spokeswoman says new thinking needed to deal with causes of extremism and protect values of 'an open and inclusive society' Labor faces internal wrangle over 'Buffett rule' to stop wealthy avoiding tax Chris Bowen rules out a policy to make rich pay a minimum tax rate, but a senior union official says 'it's way too early to be ruling measures out' States concerned they won't have input on schools funding before May budget Education minister's office confirms proposed funding model from 2018 won't be discussed at education council meeting on Friday Human Rights Commission defends survey on university sexual assaults Data from individual campuses won't be published unless individual universities decide to make results public Around the world St Petersburg bomb suspect identified as 22-year-old born in Kyrgyzstan Russian investigators say Akbarzhon Jalilov detonated bomb that killed 14 on metro carriage and left DNA on second device French election 2017: all candidates take part in live TV debate Three-and-a-half hour presidential showdown will focus on issues of how to create jobs, how to protect the French, and what social model the candidates seek Jeff Sessions orders review of police reforms prompted by high-profile shootings All reform agreements between justice department and local police forces – including Ferguson and Baltimore – to be reexamined, attorney general says Colombia landslide: search continues for missing after mud deluge kills hundreds At least 43 children among those confirmed dead, as survivors in Mocoa are still being pulled from mud and wreckage left in wake of overwhelming floods Bangladesh accused of failing to act over murder of activist Five years after an international outcry over the torture and killing of Aminul Islam, Bangladesh's government is under fire for failing to find those responsible

One last thing Melania Trump framed – a history of first lady portraits From the soft-focus sheen of the current Flotus to Nancy Reagan's fashion-forward style, official White House photos reveal more than you might think. Have an excellent day and if you spot something I've missed, let me know on Twitter at @earleyedition.

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