10 Things to Know for Today

Among 10 Things to Know: Trump choice at Homeland Security focuses on border; Trump administration taking new steps to pressure Iran; Bernie Sanders finds himself in a new role: front-runner

Your daily look at late-breaking news, upcoming events and the stories that will be talked about today:

1. NIELSEN OUT AS HOMELAND SECURITY SECRETARY

Trump names Kevin McAleenan, the well-respected U.S. Customs and Border Protection commissioner, to take over as acting head.

2. TRUMP TAKES UNPRECEDENTED STEP AGAINST IRAN

3. 'FEELING THE BERN'

Bernie Sanders surpasses his rivals in early fundraising and establishes himself as an indisputable front-runner for the Democratic presidential nomination.

4. NISSAN SHAREHOLDERS OUST GHOSN

The Japanese automaker's shareholders force out the former chairman, who faces allegations of financial misconduct.

5. VACCINES BLOCKED AS DEADLY CHOLERA RAGED IN YEMEN

An AP investigation finds that the war-torn country's massive cholera epidemic was aggravated by official intransigence and potential corruption.

6. INDIA'S SACRED COW A SYMBOL OF RISING NATIONALISM

Prime Minister Modi seeks to retain power by promoting a Hindu way of life instead of secular pluralism in the multicultural country.

7. WHAT DEMOCRATS WILL 'NEVER' SEE

Trump's tax returns, says White House chief of staff Mick Mulvaney, as a new front opens in the confrontation between the administration and Congress.

8. TELEMEDICINE TIED TO MORE ANTIBIOTICS FOR CHILDREN

Sick kids seen via telemedicine visits are far more likely to be prescribed antibiotics than those who went to a doctor's office or clinic, a new study suggests.

9. WHO WON BIG AT ACMs

Grammy-winning duo Dan + Shay solidify themselves as the hottest group in country music with multiple wins at the Academy of Country Music Awards.

10. TEXAS TECH-VIRGINIA MEET FOR BASKETBALL CROWN

The teams have reached the national championship game with tough defense, overlooked and underappreciated stars, and nail-biting tournament wins.