Handshakes and Water Cannons: G-20 Summit Kicks Off in Hamburg

President Donald Trump talks to Turkish President Recep Tayyip Erdogan, right, as German Chancellor Angela Merkel stands in the background before the beginning of the first working session of the Group of 20 Summit in Hamburg, Germany, on July 7, 2017.

The session dealt with the topics of "Global Growth and Trade."

A protester is detained by German police during the summit.

Clashes continued Friday, the day after they first broke out near the site of the summit, with German riot police confronting thousands of protesters who had taken to the streets amid the arrival of President Donald Trump.

German Chancellor Angela Merkel welcomes Dutch Prime Minister Mark Rutte.

Demonstrators are hit by police water cannons.

Hamburg police say 196 officers have been injured during two days of clashes with anti-globalization activists. 

French President Emmanuel Macron, left, adjusts his tie as leaders pose for a group photo.

Police shoot pepper spray on a demonstrator who climbed onto an armored vehicle.

World leaders pose for a group photo at the summit.

A protester climbs a beam at a metro station in Hamburg.

From left, French President Emmanuel Macron, German Chancellor Angela Merkel and President Donald Trump huddle at the start of the first working session.

A protester gestures towards a line of police.

Russian President Vladimir Putin is greeted by Angela Merkel at the official welcoming ceremony.

A protester blows bubbles next to police.

Donald Trump sits alone at the beginning of the plenary session.

Argentinia's President Mauricio Macri and his wife Juliana Awada kiss as they arrive for a concert during the summit.

Police chase protesters.

Donald Trump meets with Vladimir Putin.

Trump pressed Vladimir Putin about Russia's interference in the 2016 election when the two leaders met on the sidelines of the G-20 Summit, Secretary of State Rex Tillerson told reporters Friday.

Police try to disperse protesters at the Landungsbruecken Bridge.

PHOTOS: Protesters Clash on Eve of G-20