New Zealand Prime Minister Jacinda Ardern addresses members of the media during a joint news conference hosted with Australian Prime Minister Anthony Albanese (not pictured), following their annual Leaders’ Meeting, at the Commonwealth Parliamentary Offices in Sydney, Australia, July 8, 2022. REUTERS/Loren Elliott/File Photo WELLINGTON, Sept 21 (Reuters) - New Zealand Prime Minister Jacinda Ardern on Wednesday announced a new research initiative under a global project aimed at tackling online hate set up in the wake of a mass killing by a white supremacist in Christchurch in 2019. Ardern said in a statement that as part of the Christchurch Call...