They got to know with the photographs from the U - 2 spy plane.
<em>Hope this helped! :)</em>
Answer:
The FTC is an independent agency of the United States established in 1914 by the federal trade commission act, it's principal mission is to promotion of consumer protection and elimination and prevention of anti-competitive business practices such as coercive Monopoly, The FTC act was one of Woodrow Wilson's major acts against trusts.
Mark that person as as BRAINLIEST
A major difference between the Ottoman and the Byzantine empire during this time was most likely the fact that they had fundamentally different religions. For that reason the correct answer is most likely B - Each empire practiced a different religious faith.