Mr Biden's lead over the US president is narrower in must-win states, with Florida a key prize.
Three people were stabbed to death in Nice in what France says was an "Islamist terrorist attack".
Walmart has removed gun and ammunition displays from its stores citing concerns of "civil unrest".
Latest sales and profit figures from America's big tech companies exceed Wall Street expectations.
The Osiris-Rex probe is now safely carrying rock from an asteroid several million kilometres from Earth.
The BBC's Clive Myrie goes to the crucial state of Arizona, where black votes could decide who wins.
Republicans in the battleground state says hackers stole millions from efforts to support Donald Trump.
Until now Americans born in the city could not declare Israel as their country of birth.
Students in France and Germany tell Radio 1 Newsbeat what it's like going back into a national lockdown.
The airline's boss Scott Kirby tells the BBC passenger testing is "key to reopening the world economy".
Traffic stretched more than 430 miles (700km) in total just hours before new measures came into force.
The US economy grew 7.4% over the quarter, but output remains lower than last year.
A study of dog DNA patterns shows that our "best friend" among animals is also our oldest one.
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