European Council President Donald Tusk holds up the document from the U.K. in Brussels on Wednesday. Tusk has received a letter from British Prime Minister Theresa May invoking Article 50 of the bloc's key treaty, the formal start of exit negotiations.
British Ambassador to the EU Tim Barrow (left) delivers Prime Minister Theresa May's formal notice of the U.K.'s intention to leave the bloc to European Council President Donald Tusk in Brussels on Wednesday.
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Scottish First Minister Nicola Sturgeon and Deputy First Minister John Swinney arrive at Scottish Parliament on Tuesday. They attended the second day of debate on a motion that ultimately granted Sturgeon the authority to pursue an independence referendum.
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Large German bank KfW says it quickly recovered money it had mistakenly sent to four other banks. Here, one of its Berlin offices is seen in a 2015 photo.
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Riot policemen detain a journalist during a protest rally in St. Petersburg, on Sunday, where thousands crowded in for an unsanctioned protest against the Russian government.