10 things you need to know today: July 13, 2016

1. Sanders endorses Clinton in a bid to unite Democrats

Sen. Bernie Sanders endorsed Hillary Clinton at a New Hampshire rally on Tuesday, ending their primary season rivalry and giving the presumptive Democratic presidential nominee a boost ahead of the party's convention. Sanders noted that he had won 22 states but conceded that Clinton "won the Democratic nominating process" and announced he will "make certain she will be the next president." He said the campaign is about "addressing the very serious crises that we face," and "Hillary Clinton is far and away the best candidate to do that."

NBC News BernieSanders.com

2. President Obama and George W. Bush mourn Dallas officers

President Obama praised five Dallas police officers for their service during a memorial service on Tuesday, days after they were gunned down by a lone African-American Army veteran following a peaceful protest of recent police killings of black men. Obama called the shootings an "act of demented violence" and "racial hatred," but urged Americans to reject "despair." "We are not so divided," said Obama, who was joined at the service by George W. Bush. The former president urged Americans not to "judge other groups by their worst examples."

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The Washington Post The Dallas Morning News

3. Cameron steps aside, clearing way for Theresa May to become U.K. prime minister

David Cameron is making his final appearance before British Parliament as prime minister on Wednesday. Then he will tender his resignation to Queen Elizabeth II, and Home Secretary Theresa May will take over in the evening. May — to be Britain's second female prime minister after Margaret Thatcher — won the Conservative Party leadership race after her last rival dropped out. Cameron led the campaign for the U.K. to remain in the European Union, and announced that he would step down after Britons voted to leave in a referendum last month, leaving the job of negotiating Brexit terms to his successor.

The Washington Post The New York Times

4. Clinton extends lead in one poll, but swing state races tighten

Hillary Clinton has extended her lead over Donald Trump to 13 percentage points, according to Reuters/Ipsos poll results released Tuesday. Clinton, the presumptive Democratic presidential nominee, led her Republican rival by just 10 points in a similar poll at the end of last week. Forty-six percent of likely voters in the July 8-12 poll supported Clinton, 33 percent supported Trump, and 21 percent backed neither. Many polls show a closer race, however, and a new Quinnipiac University survey of three key swing states — Florida, Ohio, and Pennsylvania — showed the candidates neck and neck.

Reuters CNN

5. U.S. stocks hit record highs

The U.S. stock market on Tuesday continued a rally that began with Friday's unexpectedly strong June jobs report, with the Dow Jones Industrial Average rising by 0.7 percent to close at a record high of 18,347.67 the day after the S&P 500 edged into record territory. The S&P benchmark index pushed still higher on Tuesday, rising another 14.98 points, or 0.7 percent, to 2,152.14. The Nasdaq index rose 34.18 points, or 0.7 percent, to 5,022.82. Global shares rose on Wednesday as fear of Brexit fallout continued to ease.

The Associated Press Reuters

6. Trump says Ginsburg should resign after criticizing him

Donald Trump on Tuesday said that Supreme Court Justice Ruth Bader Ginsburg should resign over what he called her "highly inappropriate" criticism of his presidential candidacy. Ginsburg said in an interview published Sunday in The New York Times that she "can't imagine what the country would be — with Donald Trump as our president." "I think it's a disgrace to the court and I think she should apologize to the court," Trump said. Legal ethicists said Ginsburg went too far, but she doubled down, calling Trump a "faker" in an interview with CNN.

The Washington Post

7. Trains collide in Italy, killing at least 25

Two passenger trains collided head on in southern Italy on Tuesday, killing at least 25 people. Dozens more were injured, some critically. The trains were traveling in opposite directions on the same track through an olive grove between the towns of Corato and Ruvo di Puglia in the Puglia region. "We won't stop until we clarify what happened," Prime Minister Matteo Renzi said. "There is an absolute need to understand who is responsible."

The New York Times

8. Three arrested in alleged plot to kill Baton Rouge police

Baton Rouge Police Chief Carl Dabadie said Tuesday that three people had been arrested on suspicion of plotting to kill police in the Louisiana city, where the killing of an African-American man, Alton Sterling, set off a week of protests. Law enforcement leaders said the "credible threat" had forced officers to take aggressive steps against unruly demonstrators. "We can't take anything for granted any more," said East Baton Rouge Sheriff Sid Gautreaux. "Look what happened in Dallas. A very peaceful protest and then some crazy madman."

CNN

9. FBI closes case on mysterious skyjacker D.B. Cooper after 45 years

The FBI announced Tuesday that it is ending the search for the notorious skyjacker known as D.B. Cooper, who disappeared in 1971 with $200,000 in cash. On Nov. 24, 1971, a man onboard a Seattle-bound Northwest Orient Airlines flight identifying himself as Cooper demanded money and parachutes. The plane made an emergency landing to pick up the ransom and supplies, then took off again. Cooper then jumped, and vanished. After a 45-year investigation, the crime remains the nation's only unsolved skyjacking.

The Seattle Times

10. American League wins baseball All-Star game

The American League beat the National League 4-2 in Tuesday's Major League Baseball All-Star game. Eric Hosmer, first baseman for the 2015 World Series champions Kansas City Royals, was named the Midsummer Classic's MVP after going 2-for-3. Hosmer drove in two runs, including a solo home run that tied the game 1-1 in the top of the second inning. The victory locked in home-field advantage for the team that represents the American League in the World Series for the fourth straight year.

NJ.com