A Marine from Guernsey County was among four killed during a NATO training exercise Friday night. Stay informed about Columbus and central Ohio news, weather and sports! Follow NBC4 on our website and social media channels: https://www.nbc4i.com/ https://www.youtube.com/c/wcmhnbc4columbus?sub_confirmation=1 https://www.facebook.com/NBC4Columbus https://www.instagram.com/nbc4i/ https://twitter.com/nbc4i