5 Things to Know This Morning

5 Things to Know This Morning

— -- Your look at the five biggest and most buzz-worthy stories of the morning.

Hillary Clinton on Tuesday told ABC News’ David Muir that using a personal email account while Secretary of State was a “mistake” and that she is “sorry” for it.

2. Zach Anderson, 19-Year-Old Registered Sex Offender, Has Sentence Vacated

Zach Anderson, an Indiana teen who was ordered to spend the next 25 years on the state sex offender registry, had his criminal sexual conduct sentence vacated.

Judge Dennis Wiley, the same judge who sentenced Anderson after he pleaded guilty, granted the motion brought by Anderson’s legal team for a re-sentencing, the Berrian County Court told ABC News. In granting the motion, Wiley recused himself from the case. A bond hearing is scheduled for this Friday, his father Lester Anderson told “Nightline” today.

3. Clerk Who Denied Gay-Marriage Licenses Goes Back to Work

The apostolic Christian, now a symbol of strong religious conviction to thousands across the globe, would not say Tuesday whether she will allow licenses to continue to be issued or try to block them once again, defying a federal court order that could send her back to jail.

For stretches of the 27th edition of Williams vs. Williams, Venus gave Serena all she could handle.

And when Serena took control down the stretch to emerge with a 6-2, 1-6, 6-3 victory in a well-played U.S. Open quarterfinal, allowing her to continue pursuing the first calendar-year Grand Slam in more than a quarter-century, a smiling Venus wrapped both arms around her little sister for a warm hug at the net and whispered, "So happy for you."

"Obviously we are very, very tough competitors on the court," Serena said later, "but once the match is over, the second it's done, you know, we're sisters, we're roommates, and we're all that."

5. 'Welcome Back, Kotter' Cast: 40 Years Later

"Welcome Back, Kotter" debuted on September 9, 1975, featuring Gabe Kotter (Gabe Kaplan) returning to his Brooklyn high school to teach a new class of delinquents. The show was wildly popular during its years on the air from 1975 to 1979.