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It's been four days since Iran's top nuclear scientist, Mohsen Fakhrizadeh, died in a hail of bullets on a highway near Tehran. Iran has plausibly blamed Israel for the killing, but more than that, not much is known credibly or in detail.
This is hardly the first time that an Iranian nuclear scientist has been assassinated in an operation that has a whiff of Mossad about it. But Fakhrizadeh's prominence — he is widely regarded as the father of the Iranian nuclear program — as well as the timing of the killing, just six weeks from the inauguration of a new American president, make it a particularly big deal. Not least because an operation this sensitive would almost certainly have required a US sign-off.
Joe Biden has had one of the longest political careers in American history, but his most important act is yet to come. Can decades of experience in Washington prepare him to lead the most divided America since the end of the Civil War?
Watch the GZERO World episode: What you still may not know about Joe
What We're Watching: Ethiopia's ongoing ethnic tensions, Australia-China spat deepens, Bolsonaro rejected
Ethiopia on the brink: After ethnic tensions between Ethiopia's federal government and separatist forces in the northern Tigray region erupted into a full-blown armed conflict in recent weeks, Ethiopian Prime Minister Abiy Ahmed announced his forces had taken control of Tigray's capital on Saturday and declared victory. But the fugitive Tigray leader Debretsion Gebremichael quickly called Abiy's bluff, saying the fighting is raging on, and demanded Abiy withdraw his forces. Gebremichael accused Abiy of launching "a genocidal campaign" that has displaced 1 million people, with thousands fleeing to neighboring Sudan, creating a humanitarian catastrophe. The Tigray, who make up about five percent of Ethiopia's population, are fighting for self-determination, but Abiy's government has repeatedly rejected invitations to discuss the issue, accusing the coalition led by Gebremichael's Tigray People's Liberation Front (TPLF) of "instigating clashes along ethnic and religious lines." As the two sides dig in their heels, Ethiopia faces the risk of a civil war that could threaten the stability of the entire Horn of Africa.