LOOKING BACK

1975: Margaret Thatcher was elected leader of Britain’s opposition Conservative Party.

1990: South African Black activist Nelson Mandela was freed after 27 years in captivity.

2012: pop singer Whitney Houston, 48, was found dead in a hotel room in Beverly Hills, California.

2013: with a few words in Latin, Pope Benedict XVI did what no pope had done in more than half a millennium: announced his resignation.