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President Obama called Philando Castile's mother, Valerie Castile, to offer his condolences. CNN's Don Lemon talks to Valerie about the deadly police shootings.

As Theresa May takes on the role of Great Britain's second female prime minister there are many challenges ahead. CNN's Isha Sesay reports.

Everything you missed from Paul Ryan's CNN town hall in 90 seconds.

During CNN's town hall, House Speaker Paul Ryan said there is common ground between the two parties on mental health reform.

CNN's Jim Sciutto explains the geopolitical conflict in the South China Sea.

Archaeologists in Israel have unearthed the first Philistine burial site ever discovered, dating back to the 12th century B.C.

The wife of fallen Dallas police officer Lorne Ahrens said her husband would have taken a bullet for any one of his fellow officers.

During CNN's town hall, House Speaker Paul Ryan said the House GOP asked the director of national intelligence to not give Hillary Clinton classified briefings because they are trying to hold Hillary Clinton to the same standards as everyone else.

During CNN's town hall, House Speaker Paul Ryan was asked how he can morally justify supporting Donald Trump.

During CNN's town hall, House Speaker Paul Ryan said that Supreme Court Justice Ginsburg's comments criticizing Donald Trump show inherent bias.

During CNN's town hall, House Speaker Paul Ryan was asked are we more divided as a country than ever.

Boris Sanchez gives an update on the 3 arrests made in the Baton Rouge police shooting plot.

Expert Victor Gao discusses China's reaction to the Hague ruling on the South China Sea.

President Obama and former President George W. Bush spoke at the memorial honoring the five fallen Dallas police officers.

Sen. Bernie Sanders officially endorsed presumptive Democratic nominee Hillary Clinton, saying he is teaming up with his primary rival to defeat Donald Trump. CNN's Jeff Zeleny reports.

According to sources, Donald Trump has narrowed his vice president list down to Newt Gingrich and Mike Pence. CNN's Sunlen Serfaty reports.

The D.B. Cooper manhunt has been one of the longest investigations in FBI history after he hijacked an airlines in 1971.

In 'The Infiltrator,' Bryan Cranston plays Robert Mazur, a former federal agent who went undercover deep into Pablo Escobar's Medellín Cartel and put 85 of its members in prison. Mazur tells CNNMoney's Laurie Segall how he pulled it off.

A NASA camera captured sand dunes of dots and dashes on Mars that resemble Morse code.

NAACP President Cornell William Brooks says the presumptive GOP presidential nominee Donald Trump declined an invite to speak at the NAACP Annual Convention in Ohio.