A WHO vaccine expert asks Samoans to continue with immunisations for their children despite infant deaths; Aid sent to Vanuatu's Ambae as fresh volcanic activity hits; We look back at one of the Pacific's worst natural disasters that struck 20 years ago; NZ's aid efforts come under scrutiny; Renewed calls for an evacuation of the Nauru and Manus asylum seeker camps; We visit a Sikh Temple in South Auckland that's breaking down cultural barriers; Tonga's shirtless star aims for a third Olympic sport.