A white supremacist who killed 51 Muslim worshippers at two mosques in New Zealand in 2019 said on Monday that he was irrational when he pleaded guilty, as he sought to ?overturn his conviction. Brenton Tarrant, 35, appeared in court in Wellington via a video link, and gave evidence as he sought to overturn his guilty pleas and face a trial. The Australian national attacked two mosques in Christchurch during Friday prayers in the deadliest mass shooting in New Zealand's history. He used military-style semi-automatic weapons and livestreamed the killings on Facebook ?with a head-mounted camera. While Tarrant initially denied...