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".
Armenian mothers fear for sons on the front line in Nagorno-Karabakh as both sides suffer heavy casualties.
Traffic stretched more than 430 miles (700km) in total just hours before new measures came into force.
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.
Latest sales and profit figures from America's big tech companies exceed Wall Street expectations.
The airline's boss Scott Kirby tells the BBC passenger testing is "key to reopening the world economy".
The Osiris-Rex probe is now safely carrying rock from an asteroid several million kilometres from Earth.
The US economy grew 7.4% over the quarter, but output remains lower than last year.
The preliminary results of a referendum on assisted dying show 65.2% voted "yes" to enforcing a law on euthanasia.
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