Michael B. Jordan and Jessie Buckley earned the top acting prizes during the 98th Academy Awards ceremony in Los Angeles.The event featured the first-ever Oscar for casting awarded to Cassandra Kulukundis and a historic cinematography win for Autumn Durald Arkapaw.Conan O'Brien hosted the gala broadcast on ABC and Hulu at the Dolby Theatre while security was tightened by officials.A landmark win for South Korean music was celebrated alongside a call for global peace from the Spanish actor Javier Bardem.