The contest for Republican and Democratic contenders to become presidential candidates in the United States has entered its third

A former Black Panther activist who spent a record 43 years in solitary confinement was freed from a US prison Friday after decades of

US and Brazilian researchers are heading to João Pessoa in the state of Paraíba on Monday to recruit mothers and babies in one of the biggest government-led studies to understand whether the Zika virus is linked to microcephaly, a rare birth defect.

Harper Lee, who wrote one of America's most enduring literary classics, To Kill a Mockingbird, and surprised readers 55 years later with the publication of a second book about the same characters, dies at the age of 89 on Friday.

The United States is hoping to see a "breakthrough" in the ongoing investigation into the murder case of Bangladeshi-

The United States and Cuba will sign a bilateral agreement tomorrow to restore regular flights between the two countries after more than half a century, the

The United States said Friday it had approved selling up to eight Lockheed Martin F-16 fighter jets to Pakistan, along with training, radar and other equipment, worth a total of $699 million.

The Zika virus may be particularly adept at entrenching itself in parts of the body that are shielded from the immune system, making it harder to fight off and possibly lengthening the timeframe in which it can be transmitted, top US experts say.

US scientists have modelled how a 1930s-like "dustbowl" drought might impact American agriculture today, and found it to be just as damaging.

Surging Republican hopeful Marco Rubio wilted under sustained attack in the latest US presidential debate, denting his stature going into tomorrow's New Hampshire primary dominated by frontrunner Donald Trump.

Over 3,100 pregnant Colombian women are infected with the mosquito-borne Zika virus, President Juan Manuel Santos says.

The Pentagon releases nearly 200 photographs linked to allegations of abuse by the US military in Iraq and Afghanistan over a decade ago.

Twitter says it has suspended more than 125,000 accounts since mid-2015 "for threatening or promoting terrorist acts".

South American health ministers hold an emergency meeting on slowing the spread of the Zika virus, dubbed a "nightmare" by hard-hit Brazil, where it is blamed for brain damage in babies.

Ted Cruz fells long-time Republican frontrunner Donald Trump and Democrat Hillary Clinton was battled into a virtual tie with rival Bernie Sanders on Monday, as Iowans held the inaugural vote of the 2016 White House race.

The World Health Organization's emergency committee will debate whether a Zika virus outbreak suspected of causing a surge in serious birth defects in South America should be considered a global health emergency.

For scores of women in the epicenter of the Zika outbreak in Brazil, the joy of pregnancy has given way to fear.

More than 2,100 pregnant Colombian women are infected with the mosquito-borne Zika virus, the country's national health institute says, as the disease continues its spread across the Americas.

Private individuals will no longer be allowed to advertise guns on Facebook and Instagram, the photo-sharing service owned by Facebook.

Brazilian President Dilma Rousseff vows to "win the war" against the Zika virus, but some experts criticized her government's response and warned the Olympics could fuel the disease's spread.