Codex on the Flight of Birds of a kite as seeking a wind current. When the winds are high, one will see the bird very high in the sky, but when the winds are low, the bird stays closer to the ground. Leonardo describes how a bird rests in the air, after flapping its wings to gain altitude, by gliding downward to the ground. Folio 6 contains multiple diagrams of birds flying and their bone structure, and all of the commentary is on flight and how birds fly the way that they do. Leonardo starts off by describing how a bird ascends or descends in different
Twitter diplomacy Foreign Affairs over the 2014 Crimean crisis devolved into dueling tweets, with both ministries using the hashtag #UnitedforUkraine to convey opposite points of view. Tweeting to a global audience also poses challenges to leaders and diplomats. In early 2014, Iranian President Hassan Rouhani decided to delete a controversial tweet that received much media attention, though it was likely intended for his domestic audience. Twiplomacy's 2013 study provided new insight into the use of Twitter by governments. Twitter registration by region includes: Former US President Barack Obama is credited as being the first head of state to establish a Twitter account,