Simplify the following text for a Grade 9 native English-speaking person.
Original: Hiroshima ( ISBN 0-679-72103-7 ) is a magazine article written by Pulitzer Prize winner John Hersey that appeared in The New Yorker in August 1946 , one year after the United States dropped an atomic bomb on the city of Hiroshima , Japan .
Simplified: Hiroshima is the title of a magazine article written by Pulitzer winner John Hersey that appeared in The New Yorker in August 1946 , one year after the United States dropped an atomic bomb on the city of Hiroshima , Japan , at 8:15 a.m. , August 6 , 1945 .