Saudi Arabia hosts the G20 summit Saturday in a first for an Arab nation, but the scaled-down virtual format could limit debate on a resurgent coronavirus pandemic and crippling economic crisis.The two-day meeting of the world's wealthiest nations follows a bitter US election the results of which remain disputed by President Donald Trump and comes amid criticism of what campaigners call the group's inadequate response to the worst recession in decades.Held under the shadow of a raging pandemic, the summit which is usually an opportunity for one-on-one engagements between world leaders, is reduced to brief online sessions on pressing global issues -- from climate change to growing inequality.Discussions are expected to be dominated by the.