US Army soldier Matthew Livelsberger exploded Tesla Cybertruck in Las Vegas to "cleanse" his mind of brothers he has lost, authorities said citing notes on Livelsberger's phone. "This was...a wake-up call...What better way to get my point across than a stunt," a note said. "We're the US, the best country...to ever exist! But right now, we're terminally ill," it added.