Why three US presidents attended the funeral of Assen Jordanoff?

Curiosities and oddities from around the world selected by Dr Maria Staykova

Асен Йорданов: един българин научи Америка да лети. Source: Archive

Assen "Jerry" Jordanoff was a Bulgarian inventor, engineer and aviator.

Jordanoff is considered to be the founder of aeronautical engineering in Bulgaria, as well as a contributor to the development of aviation in the United States.