First Atomic Bomb Dropped on Japan; Missile Is Equal to 20,000 Tons of TNT; Truman Warns Foe of a 'Rain of Ruin'
NEW AGE USHERED
Day of Atomic Energy Hailed by President, Revealing Weapon
HIROSHIMA IS TARGET
'Impenetrable' Cloud of Dust Hides City After Single Bomb Strikes
By SIDNEY SHALETT