1945 - End of WWII (video)
The link address is: https://www.khanacademy.org/humanities/ap-us-history/period-7/apush-us-wwii/v/1945-end-of-world-war-ii
The link address is: https://www.khanacademy.org/humanities/ap-us-history/period-7/apush-us-wwii/v/1945-end-of-world-war-ii