For the first time in nearly two years, U.S. President Barack Obama and Russian President Vladimir Putin sat down for a one-on-one discussion on the sidelines of the U.N. General Assembly on Monday evening. In the past year, relations between Russia and the U.S. have been strained. In response to Russia's involvement in Ukraine, the U.S. has imposed sanctions against Russian officials and companies, and the two leaders hold contrasting opinions on Syria's President Bashar Assad.

On Monday, the two world leaders reportedly discussed a U.S.-led coalition's efforts in Syria against the Islamic State group, and Putin said he wasn't ruling out joining the air attacks against the group, which is also known as ISIS or ISIL. But the Russian leader said he would not send ground troops into combat.

According to Putin, his discussion with Obama was "very constructive, businesslike and frank." The photos from the evening, however, suggested that tensions remain between the two presidents. Take a look at the photos below and judge for yourself.  

 


 

GettyImages-490451024 Russian President Vladimir Putin and U.S. President Barack Obama pose for photographs before the start of a bilateral meeting at the United Nations headquarters, Sept. 28, 2015, in New York City. Photo: Getty Images

GettyImages-490448480 Russian President Vladimir Putin and U.S. President Barack Obama shake hands for the cameras before the start of a bilateral meeting at the United Nations headquarters, Sept. 28, 2015, in New York City. Photo: Getty Images

GettyImages-490448488 Russian President Vladimir Putin and U.S. President Barack Obama shake hands for the cameras before the start of a bilateral meeting at the United Nations headquarters, Sept. 28, 2015, in New York City. Photo: Getty Images

GettyImages-490448490 Russian President Vladimir Putin and U.S. President Barack Obama shake hands for the cameras before the start of a bilateral meeting at the United Nations headquarters, Sept. 28, 2015, in New York City. Photo: Getty Images

GettyImages-490440084 U.S. President Barack Obama and Russian President Vladimir Putin toast during a luncheon hosted by United Nations Secretary-General Ban Ki-moon during the 70th annual U.N. General Assembly at the U.N. headquarters, Sept. 28, 2015, in New York City. Photo: Getty Images