Countries must declare 'climate emergency': UN chief
UK's AstraZeneca says buying US biotech firm Alexion for $39 billion
Media watchdog RSF 'outraged' at Iran execution of opposition figure
First foreign aid convoy reaches Tigray capital: ICRC
Iran executes opposition figure Ruhollah Zam: state TV
One killed as multiple rockets hit Kabul: interior ministry
Trump says first US vaccine will be administered 'in less than 24 hours'
US issues emergency approval to Pfizer-BioNTech Covid vaccine: statement
Mexico regulator approves Pfizer-BioNTech coronavirus vaccine: government
US Supreme Court dismisses Texas suit challenging election result