New York's former mayor and Vancouver's mayor Gregor Robertson are pushing for climate change policies at the city level.
Fifty years ago this week, President John F. Kennedy delivered his famous Cold War speech in Berlin, West Germany.
That same week he visited Ireland, home of his ancestors who came to Boston during the potato famine in the late 1840s.
The visit marked one of the personal high points of his presidency.
“For people in Ireland, this was an important moment that this young man of Irish heritage, the first sitting president of the United States to visit Ireland, was here among them,”