Quickly catch up on the day's news: Monday, December 18

(CNN)Here's what you might have missed on CNN today:

-- BREAKING: Multiple fatalities have been reported after an Amtrak passenger train derailed over an interstate highway in Washington state. Catch up on the latest in this developing story.
-- ESPN president John Skipper has resigned from the sports network, citing a substance addiction.
-- A US air base in the UK was on lockdown briefly when a car attempted to ram a checkpoint.
    -- Puerto Rico's governor ordered a review of deaths possibly linked to Hurricane Maria.
    -- A well-known federal judge has resigned amid allegations of sexual misconduct.
    -- President Trump unveils a new national security strategy in which his "America First" campaign promise is the key objective.
    -- The world's busiest airport is slowly getting back to normal after power was restored.
    -- Stocks surged over Wall Street's early Christmas gift -- a bill cutting corporate taxes that Trump could sign this week.
    -- Twitter suspended the account of a far-right UK group that Trump retweeted.