Ten years ago: The United States declared a public health emergency as more possible cases of swine flu surfaced from Canada to New Zealand; officials in Mexico City closed everything from concerts to sports matches to churches in an effort to stem the spread of the virus. U.S. Secretary of State Hillary Rodham Clinton made an unannounced visit to Lebanon, where she met with President Michel Suleiman.
Five years ago: President Barack Obama opened the first visit by a U.S. president in nearly half a century to Malaysia, the third stop on his weeklong goodwill trip through Asia. A British helicopter crashed in southern Afghanistan, killing five NATO troops.
One year ago: Bill Cosby was convicted of drugging and molesting Temple University employee Andrea Constand at his suburban Philadelphia mansion in 2004; it was the first big celebrity trial of the #MeToo era and completed the spectacular downfall of a comedian who broke racial barriers on his way to TV superstardom. (Cosby was later sentenced to three to 10 years in prison.) Mike Pompeo was sworn in as secretary of state, minutes after being confirmed by the Senate; he then flew immediately to Brussels for meetings at NATO headquarters. President Donald Trump's White House doctor, Ronny Jackson, withdrew his nomination to be Veterans Affairs secretary in the face of accusations of misconduct. Teachers in Arizona and Colorado converged on state capitols as they launched widespread walkouts in a bid for better pay and education funding. Four quarterbacks were chosen in the first 10 selections in the NFL draft, with the Cleveland Browns grabbing Heisman Trophy winner Baker Mayfield out of Oklahoma.