A small aside:
in '03, my basic training platoon contained 41 18X's. When we donned berets, 11 of us stood there proudly, the only 'hell fighters' who never said "what if I fail?"
Too many that fell by the wayside asked that question. Quite a few of the early quitters even had infantry units they had hoped they'd fail into. Some movie quote that comes to mind goes " You acquiesce to defeat before you even begin."
For the people who mutter "too hard, too heavy, too far, too much..." Your rucksack is in the hall.
Included is the saddest song in the world, just for those waiting for the truck.