Singapore Airlines changes seatbelt rules, route after fatal turbulence Al Jazeera EnglishWhat Turbulence Did to Singapore Airlines Flight SQ321 The New York TimesSingapore Air May Face Hefty Payout Pressure After Turbulent Flight BloombergSingapore Airlines tightens seatbelt rules after turbulence flight death The GuardianWhat is it like to fly a plane during turbulence? BBC.com