The FBI says letters addressed to President Obama and a US Senator tested positive for the deadly poison ricin. Senate buildings were briefly cordoned off after more suspicious packages found.
A Tunisian man recently arrested in the German city of Cologne had allegedly obtained ingredients for the production of ricin on the internet. But where does this bio-weapon actually come from and how does it work?
If US President Donald Trump elects to pull out of the nuclear deal with Iran, Germany's business sector is likely to suffer. But even without the threats from Washington, Berlin's trade with Tehran lacks momentum.
The story of Western intervention in the seven-year Syrian civil war is one of missed opportunities. In responding to such conflicts, the West must learn from its past mistakes, says DW's Kersten Knipp.
Mike Pompeo is set to lead the State Department as the US navigates a series of stormy foreign policy issues. Will the CIA director and hawkish former Republican congressman be the hard-line diplomat Donald Trump seeks?
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