Summary Summary Companies Finland formally joined NATO on Tuesday Membership bid brought on by Russian invasion of Ukraine Accession ends decades of military non-alignment VIROLAHTI, Finland, April 4 (Reuters) - Finns living close to the country's long border to Russia as well as in the capital Helsinki welcomed Finland's new NATO membership on Tuesday, and the sense of having a larger alliance behind them after decades of military non-alignment. Finland became NATO's 31st member in a flag-raising ceremony at the alliance's Brussels headquarters attended by Finnish President Sauli Niinisto just over a year after Russian troops rolled into Ukraine. "I...