A massive volcanic eruption and tsunami hit Tonga and the Pacific. Here’s what we know

An underwater volcano near Tonga has erupted for the third time in four days, potentially threatening the ability of surveillance flights to assess the damage to the Pacific island nation following Saturday’s massive eruption and tsunami.An underwater volcano near Tonga has erupted for the third time in four days, potentially threatening the ability of surveillance flights to assess the damage to the Pacific island nation following Saturday’s massive eruption and tsunami.