US schools teach that the atom bombs were used as an alternative to an invasion of Japan. The numbers said millions would die on both sides if the Allies staged an invasion. Instead, the largest estimated loss ended up being 226,000 Japanese.
The second bomb was dropped because the military leadership in Japan couldn't believe the destruction from one bomb wasn't just another night raid that was super effective and refused to surrender. Then the second bomb dropped, and immediate unconditional surrender was issued
I especially like hiding the apps the system won't let me delete. Now that bootloaders are pretty much impossible, the next best thing is to hide and disable those stupid apps. My last phone came with Facebook Twitter Yahoo! NFL and Draft Kings as permanent space sucking native apps, so I hid them all and revoked all permissions