Cabin attendants are seen on a thermographic imaging device during a check upon their arrival on a flight from Shanghai at the quarantine station at Haneda international airport in Tokyo April 5, 2013. Chinese authorities slaughtered over 20,000 birds on Friday at a poultry market in the financial hub Shanghai as the death toll from a new strain of bird flu mounted to six, spreading concern overseas and sparking a sell-off on Hong Kong's share market. REUTERS/Toru Hanai (JAPAN - Tags: HEALTH DISASTER ANIMALS)