UNITED24, the global aid initiative launched by President Volodymyr Zelenskyy to help collect donations in support of war torn Ukraine, is working with London-based independents Pablo and Bountiful Cow to raise awareness of the ongoing invasion. The OOH drive runs nationwide on Clear Channel’s roadside digital screens and JACK’s (part of BUILDHOLLYWOOD) street posters. Created by Pablo, in partnership with Ukrainian illustrator, Antonio Firsik, each poster depicts a different city; Kyiv…