The annual G20 Summit kicks off in Brisbane on Saturday amid tensions between Western leaders and Russian President Vladimir Putin over Ukraine.

A showdown is likely following fresh reports of Russian troops pouring into eastern Ukraine. Russia denies sending troops and tanks into the country.

Although meetings between world leaders are usually carefully stage-managed, sometimes it seems impossible for them to disguise their true feelings about each other. During the G20 Summit, picture editors are on the lookout for revealing photos of awkward meetings like these:

It's not just meetings with other world leaders that can result in awkward political photos. Some politicians, particularly George W Bush and Silvio Berlusconi, have proved perfectly capable of producing inappropriate poses and facial expressions in photo opportunity after photo opportunity.

IBTimes UK rounds up some of the most embarrassing political photos of recent years.