Global leaders are meeting on Friday and Saturday, June 28 and 29, at the G20 summit in Osaka, Japan, amid a growing number of disputes and crises involving the world's largest economies.

Behind closed doors, leaders will likely discuss the threat of conflict between Washington and Iran, and the raging US-China trade war, which shows little sign of abating.

US President Donald Trump looks back at Saudi Arabia's Crown Prince Mohammed bin Salman, left, as Japan's Prime Minister Shinzo Abe, right bottom, looks on during a session Saturday at the G20 summit.
US President Donald Trump looks back at Saudi Arabia's Crown Prince Mohammed bin Salman, left, as Japan's Prime Minister Shinzo Abe, right bottom, looks on during a session Saturday at the G20 summit.
Kazuhiro Nogi/Pool/AP
Akie Abe, Brigitte Macron and Moon Jung-sook talk with kids Saturday during a symposium at the G20 summit.
Akie Abe, Brigitte Macron and Moon Jung-sook talk with kids Saturday during a symposium at the G20 summit.
Nicolas Datichel/Pool/Reuters
Trump, left, shakes hands with Chinese President Xi Jinping during a meeting Saturday on the sidelines of the G20 summit.
Trump, left, shakes hands with Chinese President Xi Jinping during a meeting Saturday on the sidelines of the G20 summit.
Susan Walsh/AP
Britain's Prime Minister, Theresa May, meets Saudi Arabian officials Saturday during her bilateral meeting with bin Salman.
Britain's Prime Minister, Theresa May, meets Saudi Arabian officials Saturday during her bilateral meeting with bin Salman.
Carl Court/Getty Images
Ivanka Trump talks with Canadian Prime Minister Justin Trudeau on Saturday during a G20 summit event on women's empowerment.
Ivanka Trump talks with Canadian Prime Minister Justin Trudeau on Saturday during a G20 summit event on women's empowerment.
Susan Walsh/AP
Merkel and Russian President Vladimir Putin look at their watches Saturday during a meeting on the sidelines of the G20 summit.
Merkel and Russian President Vladimir Putin look at their watches Saturday during a meeting on the sidelines of the G20 summit.
Alexander Zemlianichenko/AFP/Getty Images/Pool
Donald Trump attends a bilateral meeting Saturday with Xi.
Donald Trump attends a bilateral meeting Saturday with Xi.
Kevin Lamarque/Reuters
World leaders and their spouses gather on Friday, June 28, for a group photo before a cultural event at the Osaka Castle Park during the G20 summit.
World leaders and their spouses gather on Friday, June 28, for a group photo before a cultural event at the Osaka Castle Park during the G20 summit.
Brendan Smialowski/AFP/Getty Images
May meets Friday with Putin.
May meets Friday with Putin.
Stefan Rousseau/PA Images via Getty Images
Shinzo Abe, center, speaks during a working lunch Friday at the G20 summit.
Shinzo Abe, center, speaks during a working lunch Friday at the G20 summit.
Kiyoshi Ota/Pool Photo via AP
Trump and Putin hold a bilateral meeting Friday on the sidelines of the G20.
Trump and Putin hold a bilateral meeting Friday on the sidelines of the G20.
Susan Walsh/AP
Trump fist-bumps Abe, center, and Indian Prime Minister Narendra Modi on Friday.
Trump fist-bumps Abe, center, and Indian Prime Minister Narendra Modi on Friday.
Carl Court/AP
Merkel and Trump hold bilateral talks Friday at the G20 summit.
Merkel and Trump hold bilateral talks Friday at the G20 summit.
Bernd von Jutrczenka/Picture Alliance via Getty Image
Chefs walk backstage Friday at the G20 summit.
Chefs walk backstage Friday at the G20 summit.
Charly Triballeau/AFP/Getty Images
Emmanuel Macron, Trump and Abe speak Friday before a working session at the G20 summit.
Emmanuel Macron, Trump and Abe speak Friday before a working session at the G20 summit.
Susan Walsh/AP
Spouses and partners of G20 leaders pose Friday for a photo at the Tofuku-ji Temple in Kyoto, Japan.
Spouses and partners of G20 leaders pose Friday for a photo at the Tofuku-ji Temple in Kyoto, Japan.
Du Xiaoyi/Getty Images
Putin and Trump arrive Friday for a group photo of the first day of the G20 summit.
Putin and Trump arrive Friday for a group photo of the first day of the G20 summit.
Brendan Smialowski/AFP/Getty Images
Trump, Abe and Xi attend a meeting Friday at the G20 summit.
Trump, Abe and Xi attend a meeting Friday at the G20 summit.
Brendan Smialowsk/AFP/Getty Images
Staff members prepare flags Friday for meetings during the G20 summit in Osaka.
Staff members prepare flags Friday for meetings during the G20 summit in Osaka.
Brendan Smialowski/AFP/Getty Images
President Jair Bolsonaro of Brazil shakes hands Friday with bin Salman at the G20 summit.
President Jair Bolsonaro of Brazil shakes hands Friday with bin Salman at the G20 summit.
Jacques Witt/AFP/Getty Images
Sakishima, an artificial island on Osaka Bay, hosts the G20 summit at the Intex Osaka convention center.
Sakishima, an artificial island on Osaka Bay, hosts the G20 summit at the Intex Osaka convention center.
Kyodo News via Getty Images
Police officers escort a pro-democracy activist Friday from a rally outside the G20 summit, where demonstrators protest against the Chinese government.
Police officers escort a pro-democracy activist Friday from a rally outside the G20 summit, where demonstrators protest against the Chinese government.
Jae C. Hong/AP
Police officers stand guard near the venue for the G20 summit in Osaka.
Police officers stand guard near the venue for the G20 summit in Osaka.
Eugene Hoshiko/AP
Bin Salman shakes hands with Trump during a photo session Friday at the G20 summit.
Bin Salman shakes hands with Trump during a photo session Friday at the G20 summit.
Kevin Lamarque/Reuters
Ivanka Trump and Jared Kushner walk toward Donald Trump and Abe to join them for a photograph on Friday, the first day of the G20 summit.
Ivanka Trump and Jared Kushner walk toward Donald Trump and Abe to join them for a photograph on Friday, the first day of the G20 summit.
Carl Court/Getty Images