Joseph H. Alexander, Closing In: Marines in the Seizure of Iwo Jima
“ Japanese artillery and mortar fire continued to rake the beachhead. The enormous spigot mortar shells (called “flying ashcans” by the troops) and rocket-boosted aerial bombs were particularly scary—loud, whistling projectiles, tumbling end over end. Many sailed completely over the island; those that hit along the beaches or the south runways invariably caused dozens of casualties with each impact. Few Marines could dig a proper foxhole in the granular sand (“like trying to dig a hole in a barrel of wheat”) . ”
