'It is extremely uncomfortable': Hanoi becomes world's most polluted city - Hanoi looks forward to Vietnam-Russia summits this year -- envoy - Hanoi holds welcoming ceremony for Russian PM, who arrived on visit to Vietnam - Hanoi karaoke bar fire kills 11, arson suspected - Vietnamese PM visits Kalashnikov display at Hanoi show - Arson at karaoke bar in Vietnam's Hanoi kills 11, police say - Man allegedly sets Hanoi karaoke bar on fire, killing 11 people - Super Typhoon Yagi kills at least 197 in Vietnam, forces evacuations in Hanoi - Hanoi river level hits 20-year high as SE Asia typhoon toll passes 150 - Hanoi flooded by swollen river as Typhoon Yagi leaves 179 dead