Ezra Cohen, who is a member of the Public Interest Declassification Board [PIDB] which advises the president and Congress on the classification system and safeguarding classified records, explains the records system and why it “has not come anywhere near to keeping pace." PIDB member Ezra Cohen says more trained experts should be involved with handling records at the end of a presidential administration but that Congress has decreased funding at the National Archives and specifically for those who are responsible for handling classified records.

UPDATE: A U.S. official tells CBS News the suspected Chinese spy balloon is now over "the middle of the country." A Chinese balloon has never been over the middle of the country before, CBS News' David Martin reports. cbsnews.com/news/chinese-s… The only previous time a Chinese balloon flew over the continental U.S. was a brief overflight of Florida, CBS News' David Martin reports. There have also been overflights of Hawaii & Guam. In previous instances, China has been able to recover the balloon. cbsnews.com/news/chinese-s…

MEDAL OF FREEDOM: President Biden is presenting the country's highest civilian honor, the Presidential Medal of Freedom award, to 17 Americans.

Here’s who is receiving the award by having made a notable contribution to the U.S. cbsn.ws/3aqxSEE Simone Biles, 25

THREAD: Countless people are gathering in different cities across the globe, like here in Berlin, to protest and denounce Russia’s decision to invade Ukraine and stand in solidarity with Ukrainians.

MORE: cbsn.ws/3plrOl2 Amsterdam, Netherlands

EXCLUSIVE: John Ratcliffe, President Trump’s pick as top U.S. spy chief, pushes back against critics saying he’s not qualified for the role. Watch more from his interview with @cbs_herridge @CBS_Herridge John Ratcliffe tells @cbs_herridge how he will tackle the coronavirus if confirmed as intel chief

WATCH LIVE: Former President Obama is speaking out about threats to U.S. democracy – just before he goes on the campaign trail for several Democrats this fall cbsn.ws/2NW6JsJ Former President Obama on why he declined to speak at University of Illinois' 2017 commencement: "The truth was, I was also intent on following a wise American tradition of ex- presidents gracefully exiting the political stage and making room for new voices and new ideas."

BREAKING: New study estimates Hurricane Maria caused 2,975 deaths in Puerto Rico -- a drastically higher number than the initial government report of 64 dead. cbsn.ws/2LxOV5d "We always knew that based on the level of the catastrophe that Puerto Rico suffered that there were going to be -- there was going to be a high number of deaths," says Carlos Mercader, who helped facilitate report on Hurricane Maria deaths cbsn.ws/2BTtJXO

"Since this movement began, people have asked me, do you think any change is going to come from this?" says Cameron Kasky, a Stoneman Douglas student. "Look around. We are the change." cbsn.ws/2pDCfAK #MarchForOurLives "We hereby promise to fix the broken system we've been forced into and create a better world for the generations to come," Cameron Kasky says. "Don't worry, we've got this." cbsn.ws/2pDCfAK #MarchForOurLives

WATCH: Parkland shooting survivor and emergency responders hold press conference at hospital cbsn.ws/2BR71h6 Lt. Laz Ojeda gets emotional as he recounts the Parkland, Florida, school shooting and how he and EMTs saved a student named Maddie who was shot by the suspected gunman cbsn.ws/2BR71h6

WATCH LIVE: Florida school shooting survivors speak as students hold a rally calling for gun control measures in the state's capital cbsn.ws/2sJSYHs "If we had stricter gun control measures in Florida, 17 families will be having dinner tonight together instead of mourning the loss of their loved ones," Stoneman Douglas student Florence Yared says cbsn.ws/2sJSYHs

NOW: Investigators hold press conference days after #48Hours' @EFMoriarty reports on Robert Wagner, who is now a person of interest in actress Natalie Wood's death cbsn.ws/2nDUzJS “There are new witnesses…we’ve interviewed a lot of new people...People who knew the couple or had knowledge of what was going on that weekend. It has been extremely helpful in recreating what happened,” official says on Natalie Wood case cbsn.ws/2E4x5nr

EARLIER: Olympic gymnast Aly Raisman testified at ex-USA Gymnastic doctor Larry Nassar's sentencing hearing cbsn.ws/2EVhCG6 "Larry, you do realize now that we, this group of women you so heartlessly abused over such a long period of time, are now a force and you are nothing," Aly Raisman says cbsn.ws/2EVhCG6

WATCH LIVE: Hawaii authorities hold a press conference following Saturday's false ballistic missile alarm cbsn.ws/2FvxMXU "I know firsthand that what happened today was totally unacceptable," Hawaiian Gov. David Ige says. "And I'm sorry for that pain and confusion that anyone might have experienced." cbsn.ws/2FvxMXU

DEVELOPING: Amtrak train derails onto Interstate 5 in Washington state cbsn.ws/2j9xWKB MORE: First responders are treating the derailment as a mass casualty incident, CBS News affiliate KIRO-TV reports cbsn.ws/2jc6LyW