You will note that Pres. Hinckely includes both mortal and spiritual weaponry in this statement. One without the other does not work.
In reference to 3 Nephi 4:33* President Hinckley said:
"While we must have science, while we must have education, while we must have arms, we must also have righteousness if we are to merit the protection of God" (Teachings of Gordon B. Hinckley, 40).
* 33 And their hearts were swollen with joy, unto the gushing out of many tears, because of the great goodness of God in delivering them out of the hands of their enemies; and they knew it was because of their repentance and their humility that they had been delivered from an everlasting destruction.
Hey, that's cool! I figured his bodyguards protected him with weapons and stuff... Not like he'd just command the bullets to drop from the air with his massive Priesthood powers like some yayhoo said somewhere once...
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Life is tough but it's tougher if you're stupid. -John Wayne