Ukraine and seven other Central and Eastern European nations on March 29 called on the world's top tech firms to take action to fight disinformation by hostile powers on their social media platforms, which they say undermines peace and stability. In an open letter signed by their prime ministers, the countries said tech platforms such as Facebook should take concrete steps, including rejecting payments from sanctioned individuals and altering algorithms to promote accuracy over engagement. The letter was signed by the prime ministers of Ukraine, Moldova, Poland, Czech Republic, Slovakia, Estonia, Latvia, and Lithuania. To read the original story by Reuters, click here.