US actor Sean Penn met frontline troops in Ukraine, pictures showed Wednesday, the latest appearance in a surprise tour of the war-torn country after skipping the Oscar awards ceremony on Sunday. Images published by Ukraine’s 157th Separate Mechanized Brigade showed the Oscar-winner standing in front of a sign for Sloviansk, a Ukrainian town about 20 kilometres (12 miles) from the front line with Russia, as well as meeting soldiers and signing an autograph in an undisclosed location. JOIN US ON