needed

With Heller's theory proven, researchers now have the empirical foundation needed to explore potential applications.

“We’re shaking this government. The rallies will go on for as long as needed. We have no other option. It’s a liberation fight. We know who we’re fighting with, and that’s Russia.”

McCartney said confusion over the break-up had festered because the band's new manager Allen Klein - with whom he refused to align - said he had needed time to tie up some financial loose ends.

In March, Dan Green, agriculture director for British Sugar, said the pesticide was needed "to protect the UK sugar beet crop and farmer livelihoods".

“It was incredibly painful watching my child struggle before we were able to get her the life-saving healthcare she needed,” Samantha Williams said in a statement.