According to Hennemusic
have pulled out of their July 2nd show in Kiev, Ukraine because of the ongoing civil war in the country. The date was to be the final stop on Aerosmith's "Let Rock Rule"
European tour. An official statement from event promoter National Corporation Of Entertainment reads as follows:"With much regret we have decided to cancel the Aerosmith show in Kiev on July 2nd. It is impossible to produce this show in Ukraine while there is civil war. We can't ensure safety to the artists, crew and the audience. We can't ensure safety of the equipment. We're facing many economic and technical difficulties and in a state of civil war those difficulties are impossible to resolve. Therefore we just can't carry out the show on July 2nd and are very sorry for that.""We all did our best to present the show in Kiev but we have no option but to cancel. We hope that Aerosmith will be able to perform in Ukraine at some time in the future when there is peace and more stability in Ukraine. We are arranging refunds for ticket-holders."
Details regarding refunds are available here