The FBI admitted Friday that it received a tip from "a person close to" Nikolas Cruz, the 19-year-old who has confessed to carrying out Wednesday's shooting at Marjory Stoneman Douglas High School, that "provided information about Cruz's gun ownership, desire to kill people, erratic behavior, and disturbing social media posts, as well as the potential of him conducting a school shooting." The bureau did not follow through with the established protocol, allowing the information to fall by the wayside, the FBI said.

The tip came into the FBI's Public Access Line (PAL) on Jan. 5, 2018, and the information should have been passed on to the FBI Miami Field Office for subsequent investigative steps, but it was not. "I am committed to getting to the bottom of what happened in this particular matter," said FBI Director Christopher Wray.

Separately, a YouTube account posting under the name Nikolas Cruz commented on a video in September saying, "I'm going to be a professional school shooter." The comment was reported to the FBI by another YouTube user, but the investigation apparently led nowhere.

Cruz killed 17 at the Florida high school Wednesday. Jeva Lange

President Trump on Twitter Saturday morning announced Secretary of the Interior Ryan Zinke is leaving his administration by year's end:

Trump did not say whether Zinke resigned or was fired.

Zinke's tenure at Interior has been marred by allegations of unethical conduct which have reportedly troubled Trump and prompted a Justice Department investigation. His policy proposals have included privatizing campgrounds on public land, shrinking national monument land, and raising national park visitor fees to cover renovations.

This announcement comes one day after Trump said Mick Mulvaney, director of the Office of Management and Budget and acting director of the Consumer Financial Protection Bureau, will step in as acting White House chief of staff. A Politico report in late October indicated further turnover in the already volatile administration was likely following the midterm elections. Bonnie Kristian

The Department of Education is forgiving about $150 million in student debt belonging to some 15,000 borrowers, around half of them former attendees of the for-profit Corinthian Colleges chain, which went bankrupt in 2015. The agency announced the loan cancellation Thursday in response to a federal court order and began notifying affected students by email Friday.

Education Secretary Betsy DeVos had sought to avoid implementing a set of Obama-era "borrower defense" regulations, among them an option of loan discharges for students whose schools have closed. But a federal judge ruled against her plan in September and also rejected a similar push by for-profit colleges in October.

The loan forgiveness process could take up to three months to complete, but affected borrowers do not have to take any action to benefit. Any payments made on the discharged loans will be applied to other debt on the student's account or returned to the payer, the Education Department announcement notes, and "information related to a discharged loan and its payment history [will be] removed from the borrower's credit report." Bonnie Kristian

A federal judge in Texas ruled Friday night that the Affordable Care Act (ACA), commonly known as ObamaCare, must be "invalidated in whole" because its individual mandate provision is unconstitutional.

District Judge Reed O'Connor argued the mandate is "essential to and inseverable from the remainder of the ACA," and that it cannot "be fairly read as an exercise of Congress's tax power," contrary a 2012 Supreme Court ruling upholding the ACA as a tax, "and is still impermissible under the Interstate Commerce Clause."

President Trump celebrated the decision on Twitter:

Despite Trump's enthusiasm, the ruling's immediate impact is limited. The Centers for Medicare and Medicaid Services told Fox News ACA enrollment, which is open through Saturday, Dec. 15, will continue as usual because the case will be litigated further. "There is no impact to current coverage or coverage in a 2019 plan," the agency said. Bonnie Kristian

President Trump on Friday tweeted an announcement that Mick Mulvaney, Director of the Office of Management and Budget, will step in as acting White House chief of staff.

Mulvaney, who also worked as the acting director of the Consumer Financial Protection Bureau before bowing out this week, will replace current White House Chief of Staff John Kelly, who will depart at the end of the year. "Mick has done an outstanding job while in the administration," wrote Trump, "I look forward to working with him in this new capacity."

Trump additionally praised Kelly as a "great patriot" who "served our country with distinction." Trump's reported first choice to replace Kelly, Vice President Mike Pence's chief of staff Nick Ayers, turned down the job, leaving Trump to consider several administration officials and lawmakers for the post. Summer Meza

Gun deaths in the U.S. reached their highest point in nearly 40 years in 2017, according to a CNN analysis of a report released by the Centers for Disease Control and Prevention.

The CDC's data showed that nearly 40,000 people died by gun last year, CNN reports, which is up from 28,874 in 1999. CNN's analysis also found that more than 23,000 people died from suicide by guns, which is the highest rate in 18 years.

The report found that white men led the gender and racial demographics for gun deaths by suicide, and black men led in homicide deaths.

Former U.S. Rep. Gabrielle Giffords (D), who was nearly killed in 2011 due to a gun wound, released a statement reacting to the CDC's report.

"This data from the CDC reminds us how many lives our gun violence crisis alters every year – and why so many Americans are rising up to demand action," Giffords said. "It's unacceptable that the number of deaths from shootings keeps escalating while Washington, D.C. refuses to even debate policies we know would help save lives." Marianne Dodson

People are using the highest levels of government to come up with the world's lowest security passwords.

More than 5 million passwords were leaked this year, password manager SplashData's analysis of breached data reveals. Your standard "iloveyou" and "qwerty" made the list of the most popular passwords in the world, but so did one newcomer: "donald."

Of all the infinite combinations of letters, numbers, and symbols people could use, nearly 10 percent of internet users secured their accounts with one of the 25 worst passwords out there, per TechCrunch. After "123456" and "password," strings of numbers make up the next five "worst passwords" on SplashData's list. And making its first-ever top-25 appearance, clocking in at No. 23, is "donald."

No, SplashData's CEO assures us "this is not fake news." Hackers find "celebrity names" and other common words are often used as passwords, as are simple keyboard strings. So try passwords of at least 12 characters, and mix in some symbols and numbers, SplashData recommends. And whatever you do, don't use anything on the list below, as compiled by TechCrunch. Kathryn Krawcyzk