AP PHOTOS: Macy's parade flying high since 1920s

1940 - In this 1940 handout photo, a helium inflated Superman rises over Times Square to lead the Macy's Thanksgiving Day Parade in 1940. According to Macy's, in 1929, a newly added safety valve allowed helium to slowly seep out of the balloons as they floated  above the city's streets. (AP Photo/File)
1940 - In this 1940 handout photo, a helium inflated Superman rises over Times Square to lead the Macy's Thanksgiving Day Parade in 1940. According to Macy's, in 1929, a newly added safety valve allowed helium to slowly seep out of the balloons as they floated above the city's streets. (AP Photo/File)
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