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THERE'S ANOTHER HUGE LOTTERY TONIGHT. THE POWERBALL JACKPOT CLIMBED TO $ 570 MILLION. GOOD LUCK. COMING UP, ATTORNEY GENERAL JEFF SESSIONS SPARKS A CLOUD OF CONFUSION IN STATES WHERE MARIJUANA IS LEGAL. AND LATER, SHE'S 99 AND SHOWS NO SIGNS OF SLOWING DOWN. SO WHAT'S HER SECRET ?>> Ninan: THIS PAST WEEK, ATTORNEY GENERAL JEFF SESSIONS REMOVED OBAMA- ERA GUIDELINES THAT STEERED FEDERAL PROSECUTORS AWAY FROM CRACKING DOWN ON MARIJUANA IN STATES WHERE IT'S LEGAL. MIREYA VILLARREAL SAYS THE REMOVAL OF THAT BARRIER HAS SPARKED A CLOUD OF CONFUSION .>> Reporter: THE ZEN HEALY MARIJUANA DISPENSARY IN WEST HOLLYWOOD, CALIFORNIA, HAS HAD A STEADY STREAM OF CUSTOMERS SINCE LEGAL RECREATIONAL SALES STARTED ON MONDAY. BUT NOW THE NEXT PEOPLE THROUGH THE DOOR COULD BE FEDERAL AUTHORITIES COMING TO SHUT THEM DOWN .>> IT'S ALWAYS A POSSIBILITY IN YOUR MIND THAT THEY'LL GO AFTER THE MOST SUCCESSFUL ONE FIRST TO MAKE AN EXAMPLE .>> Reporter: CALIFORNIA IS ONE OF SIX STATES, ALONG WITH THE DISTRICT OF COLUMBIA, WHERE RECREATIONAL POT SALES HAVE BEEN LEGALIZED. BUT UNDER FEDERAL LAW, IT'S STILL ILLEGAL TO GROW, BUY OR USE MARIJUANA. UNDER THE OBAMA ADMINISTRATION IT WAS FEDERAL POLICY TO RESPECT STATE MARIJUANA LAWS. BY REVERSING THAT POLICY, THE U. S. ATTORNEY GENERAL'S OFFICE IS NOW GIVING PERMISSION FOR STATES TO PROSECUTE MARIJUANA CASES BUT WITHOUT A CLEAR DIRECTIVE TO DO SO. THE MOVE DREW STRONG OBJECTIONS FROM MANY IN STATES THAT HAVE LEGALIZED RECREATIONAL POT, INCLUDING COLORADO'S REPUBLICAN SENATOR CORY GARDNER .>> IN 2016, PRESIDENT TRUMP CAME TO COLORADO AND SAID HE BELIEVED IN STATES' RIGHTS, THAT HE WOULDN'T USE LEGAL POWERS TO REVERSE COLORADO'S DECISION. WHY DOES JEFF SESSIONS THAT PRESIDENT TRUMP WAS WRONG ?>> Reporter: THE SENATOR TWEETED THAT HE WOULD TAKE " ALL STEPS NECESSARY" TO FIGHT THE POLICY CHANGE INCLUDING POSSIBLY " HOLDING UP THE SENATE" FROM PENDING DEPARTMENT OF JUSTICE NOMINEES. COLORADO, OREGON, AND CALIFORNIA, ALL SAY THEY HAVE NO PLANS TO CHANGE THEIR PROSECUTION STRATEGIES, AND THEY HAVE THE PUBLIC'S SUPPORT. A RECENT POLL SAYS ACCEPTANCE OF LEGAL MARIJUANA IS AT AN ALL- TIME HIGH-- 64 %. LEGAL EXPERTS SAY THAT LEVEL OF ACCEPTANCE COULD MAKE FEDERAL PROSECUTIONS DIFFICULT .>> WHEN THEY ACTUALLY HAVE TO TRY THIS CASE AND THEY END UP IN FRONT OF A JURY THAT HAS VOTED FOR THE LEGALIZATION OF MARIJUANA, YOU COULD SEE SOMETHING LIKE JURY NULLIFICATION AND NO CONVICTIONS .>> Reporter: SOME CANNABIS FARMERS ARE ALREADY RECONSIDERING THEIR APPLICATION FOR LICENSES BECAUSE THEY'RE WORRIED ABOUT BEING ON A PUBLIC LIST THAT COULD BE AVAILABLE TO INVESTIGATORS AND PROSECUTORS. NOW, THIS LOCATION IN WEST HOLLYWOOD WAS RAIDED THREE TIMES BEFORE 2013. ALL OF THEIR MERCHANDISE WAS EITHER CONFISCATED OR DESTROYED, SO THAT FEAR IS ABSOLUTELY REAL. MIREYA VILLARREAL, CBS NEWS, WEST HOLLYWOOD, CALIFORNIA .>> Ninan: STILL AHEAD, THE HOLIDAY SEASON UNLEASHES A TSUNAMI OF CARDBOARD BOXES. SO WHERE DO THEY ALL GO ?>> Ninan: AFTER THE HOLIDAYS COMES THE PEAK SEASON FOR RECYCLING, SO WHERE DOES THAT MOUNTAIN OF CARDBOARD BOXES ALL GO, AND WHAT'S BEING DONE TO CUT DOWN ON THE WASTE? JAMIE YUCCAS LOOKED INTO THIS .>> Reporter: ONE AFTER ANOTHER, A TRAIN OF TRUCKS UNLOADS AT THIS LOS ANGELES- AREA RECYCLING CENTER. NATASHA GAGARIN EMPTIED AN S. U. V. PACKED WITH EMPTY BOXES. HOW MANY BOXES DO YOU THINK YOU HAD IN YOUR CAR ?>> OH, WELL OVER 200, WELL OVER .>> Reporter: IN THE U. S. ALONE, AMAZON USED 6, 000 TRUCKS AND 32 PLANES TO GET PACKAGES TO ITS PRIME MEMBERS LAST YEAR. AND THE TRUCKS JUST KEEP BRINGING IT IN .>> YUP .>> Reporter: KREIGH HAMPBEL IS THE RECYCLING COORDINATOR FOR THE CITY OF BURBANK. ARE YOU SEEING AN INCREASE IN THE AMOUNT OF CARDBOARD ?>> ABSOLUTELY. IT'S A TSUNAMI OF CARDBOARD. EVERYTHING GOES UP 5 %, 10 % DURING THE HOLIDAYS .>> Reporter: THAT'S A CONCERN FOR HAMPEL BECAUSE THE RECYCLING PROCESS IS SO COMPLEX. THE BOXES ARE SORTED AND BUNDLED HERE. THEN, HE SAYS, THEY'RE LOADED INTO CONTAINERS AND SHIPPED ACROSS THE PACIFIC TO CHINA. THERE, THE BOXES ARE SOAKED IN THE WATER, STRIPPED OF STAPLES, AND REBORN AS BOXES. BUT AMAZON SAYS THEY'VE PUT A NEW FOCUS ON SUSTAINABLE PACKAGING, MOVING OVER 100 MILLION SHIPMENTS FROM BOXES TO PADDED MAILERS IN 2017. THEY RELEASED THIS VIDEO .>> WE MAKE THESE KINDS OF PACKAGES EASY TO OPEN, MINIMAL WASTE AND 100 % RECYCLABLE. AS A RESULT, TO DATE, WE'VE ELIMINATED 181, 000 TONS OF WASTE .>> Reporter: AMAZON DOES HAVE A CHALLENGE IN TERMS OF ITS PACKAGING. IT WANTS IT TO BE EXACT, BUT IT ALSO WANTS IT TO GET TO YOU INTACT. AS FOR ALL THE CARDBOARD HERE, RECYCLERS SAY IT COULD TAKE UNTIL FEBRUARY FOR IT ALL TO BE CLEARED OUT. JAMIE YUCCAS, CBS NEWS, LOS ANGELES .>> Ninan: UP NEXT, THE POWER OF SHE. THE WORLD'S OLDEST YOGA INSTRUCTOR AND COMPETITIVE DANCER .>> Ninan: WE END TONIGHT WITH THE WORDS OF WISDOM FROM AN AGELESS SPIRIT. SHE WAS BORN NEARLY 100 YEARS AGO IN 1918, AND SHE'S STILL A WORLD- CLASS YOGA INSTRUCTOR AND COMPETITIVE BALLROOM DANCER. SHE SHARED HER SECRETS TO A LONG AND MEANINGFUL LIFE WITH ROXANA SABERI .>> Reporter: WITH STEPS AND SPINS LIKE THESE, TAO PORCHON- LYNCH IS REDEFINING AGE .>> I'M 99 .>> Reporter: DO YOU FEEL 99 ?>> NO, I DON'T FEEL ANY AGE AT ALL .>> Reporter: AT 87, SHE BEGAN COMPETING ON THE DANCE FLOOR, AND OFTEN WINNING .>> I DO NEARLY EVERYTHING FROM THE JITTERBUG TO WALTZ, FOXTROT, AND I DON'T STOP .>> Reporter: HER TEACHER AND PARTNER, ANTON BILOZOROV, IS ONLY 26. HE SAYS SHE INSPIRES HIM AND HIS OTHER STUDENTS TO KEEP MOVING .>> WHEN I HAVE ANOTHER STUDENT TO PRACTICE IN DANCE, AND THEN, " OH, I'M OLD ." LOOK, DON'T TELL ME. I HAVE A STUDENT WHO IS 99, AND SHE NEVER TELL ME THAT SHE'S OLD .>> Reporter: BORN IN FRENCH INDIA, TAO MODELED AND ACTED, WITH ROLES INCLUDING THE GOLDEN IDOL IN THE 1940 REMAKE OF " THE THIEF OF BAGHDAD ." SHE ALSO TAUGHT YOGA, SIDELINED ONLY BRIEFLY BY INJURIES .>> I'VE HAD THREE HIP REPLACEMENTS .>> Reporter: HOW DO YOU KEEP DANCING AFTER HAVING HAD THREE HIP REPLACEMENTS ?>> BECAUSE I'M THE BOSS .>> Reporter: AS SHE AND ANTON PRACTICED ON A RECENT WEEKEND IN HARTSDALE, NEW YORK, HER FRIENDS FILED IN FOR A SURPRISE .>> THE " GUINNESS" WORLD RECORD HAS DECIDED TO AWARD YOU WITH THE TITLE FOR THE OLDEST FEMALE COMPETITIVE DANCER .>> Reporter: AND IT ISN'T EVEN TO YOU'S FIRST WORLD RECORD. FIVE YEARS AGO " GUINNESS" NAMED HER THE OLDEST YOGA TEACHER. SHE STILL HOLDS SEVEN CLASSES A WEEK FOR NEWCOMERS LIKE ME, AND LONGTIME STUDENTS .>> SHE'S SHOWN ME THAT YOU JUST, YOU'VE GOT TO TRY .>> Reporter: WHERE DO YOU GET ALL OF THIS ENERGY? THE BREATH OF LIFE. THE BREATH OF LIFE IS RIGHT INSIDE OF US. YOU TO FEEL THE DANCE OF LIFE INSIDE OF AND YOU KNOW THAT NOTHING IS IMPOSSIBLE .>> Reporter: AND TO SHARE THAT DANCE WITH OTHERS, SHE SAYS, IS THE BEST REWARD OF ALL. ROXANA SABERI, CBS NEWS, IN HARTSDALE, NEW YORK .>> Ninan: AND TAO ALSO SAYS NEVER PUT NEGATIVE THOUGHTS IN YOUR MIND BECAUSE IT GOES RIGHT TO YOUR BODY. THAT'S THE CBS WEEKEND NEWS FOR THIS SATURDAY. LATER ON CBS, " 48 HOURS ." I'M REENA NINAN IN NEW YORK. THANK YOU FOR JOINING US. GOOD NIGHT.
