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Airlines rushed to introduce a two-crew cockpit rule as serious depression was investigated as the Alps crash pilot's motivation. 

Apple's Tim Cook said he'll give away his fortune, while the White House declared it would spend a fortune on its war on superbugs. Meanwhile, Willie Nelson declared war on pot prohibition. 

A two-crew cockpit rule was introduced

After learning more about what happened in the last minutes of the Germanwings crash, airlines rushed to introduce a rule making it mandatory for two people to be in the cockpit at all times during a flight. It's a rule U.S. airlines already have in place. 

READ MORE: Two person cockpit rule introduced by airlines after Alps crash

The crash pilot's depression was revealed

Investigators looking into why Andreas Lubitz might have chosen to fire the Germanwings plane into a ravine have found evidence of some serious mental health issues. He took 18 months out to get psychiatric help for depression some years back, though the airline claims he was fit to fly. 

READ MORE: Crash pilot had taken career gap after serious depressive episode

War on superbugs was declared

The White House has pledged to spend $1.2 billion on a program designed to tackle resistance to antibiotics. They're not working that well anymore because they're overused in hospitals and in industrial farming, which is why people keep getting nasty superbugs.

READ MORE: $1.2bn fund to stamp out superbugs and fight antibiotics resistance

Willie Nelson planned to open weed-selling joints

The iconic country singer, who's also famously a cannabis advocate, will launch a brand of quality marijuana. "Willie's Reserve" will be sold alongside ethically produced marijuana from small-scale growers, in states that have given the green light to the weed.

READ MORE: Willie Nelson, 81, to launch connoisseurs' marijuana brand

Tim Cook wanted to give away $785M

Apple's CEO said that he plans to give away all of his fortune before he dies, apart from the part that will pay for his beloved nephew's education. The secret philanthropist is being coy about who's going to get the cash, but apparently he's already donated millions to charity Product Red and funded several hospitals. 

READ MORE: Apple CEO Tim Cook to give away his $785m fortune before he dies