the expense of what our ancestors went through. reporter: dana griffin, nbc news, los angeles. when we come back, the gold rush of 23. why modern-day prospectors are hoping to strike it rich in california. in the f future, everythihing will bebe powerd by renewewable energrgy. but t it s not a as easy as flippining a switchch. it s a lonong road, requirining decades s of time and d trillions s of dollars. but what i if there wawas a bebetter direcection onon the path h to zero carbon e emissions?? an e energy soururce that ss availablble right nonow, that s affffordable, p plentif, and enenvironmentatally friend. there is. . and it s p propan. get ththe facts atat propane.e.com/now. i i have modererate to sesevere crohnhn s diseseas. now, therere s skyryrizi. t things are e looking upu i v ve got sympmptom relief control o of my crohnhn s means evererything to o me. contrtrol is evererything to fefeel significant symymptom rerelief with h skyrizi,