The gunman killed after firing at a White House checkpoint had a history of mental health concerns and prior Secret Service encounters, officials say.

White House Shooting live updates: Both individuals were said to be in critical condition, according to the official, who spoke on the condition of anonymity because they were not authorised to discuss the investigation.

Secrecy surrounding White House security makes details hard to come by, but President Donald Trump’s court fight over his $400 million ballroom casts some light on an underground bunker at the site that has had a role in history. The bunker emerged in ...