Well, they were over 8 miles away when the bomb detonated, so they wouldn't have seen any of the destruction. Even reconnaissance planes were initially unable to survey the extent of the destruction due to the enormous amounts of smoke caused by the fires, and dust brought up by the bomb.
Also the service ceiling for the B-29 is 31,850ft. 40,000ft would've been impossible.
The declaration of faith is the first of the five pillars of Islam, because it is very important. Declaring faith mean being dedicated and loyal to the religion. It means you sincerely believe in Islam, you are willing to follow the beliefs, and that there is no other god but Allah.
Julius Caesar led his army across the Rubicon River in January 49 B. He charged the Roman Republic into civil wars and successfully defeated his rivals which made him declared to himself that he is a dictator for life. He created a huge political influence after all of his victories and gained a lot of power.
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