U.S. President Barack Obama is on a week-long trip to Saudi Arabia, Britain and Germany. Obama arrived in Germany midday Sunday, where he and German Chancellor Angela Merkel will discuss the global economy, terrorism, transatlantic security and many other issues.
President Obama on Three-Country Tour

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Stephan Weil, governor of German state of Lower Saxony, right, welcomes U.S. President Barack Obama, center, upon his arrival at the airport in Hannover, northern Germany, April 24, 2016. Obama is on a two-day official visit to Germany.

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Guard of honour arrives before the welcome ceremony of U.S. President Barack Obama at Schloss Herrenhausen in Hanover, Germany, April 24, 2016.

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Thousands of demonstrators protest against the planned Transatlantic Trade and Investment Partnership, TTIP, and the Comprehensive Economic and Trade Agreement, CETA, ahead of the visit of U.S. President Barack Obama, in Hannover, Germany, April 23, 2016.

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President Barack Obama, 2nd left, greets actors on stage after watching them perform Shakespeare's Hamlet at the Globe Theatre in London, April 23, 2016.