The White House has warned Russia could use unsupported claims about biological and chemical weapons development in Ukraine as cover for escalating the war there, underscoring the power — and limits — of chemical and biological forensics.
The big picture: Allegations that chemical or biological weapons have been used can be difficult to investigate and are one way for a country to create a pretext for aggression.
The European Space Agency suspended its Mars rover mission on Thursday in response to Russia's invasion of Ukraine, after Russia's state-run space agency halted its operations at Europe's spaceport.
Why it matters: ESA's ExoMars rover mission, Europe's first-ever rover mission to the Red Planet to search for signs of life, was set to launch from Guiana Space Centre aboard a Russian Soyuz rocket this year.
