On his first visit to California, the US president discusses what type of wall he would like to see.
The Facebook boss declines to appear before MPs and will send a senior executive instead.
Apotex founder Barry Sherman and his wife Honey were found in the basement of their Toronto home.
The New York Times has traced links between one company, millions of bots and various celebrities.
The US president's lawyers order Steve Bannon to desist after he was quoted in a new book.
Eric Garner's death provoked protests. Could it also help improve relations between the police and public?
A search and rescue operation was called off on Sunday due to heavy wind and snow.
A former student is in custody after the attack in Parkland, which left at least 17 dead.
The charity has for the first time published a 2011 report on sexual misconduct claims in Haiti.
Adm Marcelo Srur is sent into retirement following criticism of the operation to rescue the submarine.