The England research stop brought me back to unusually familiar ground, but never before had my visit coincided with that of a U.S. president. The result: a close-up view of protests.
Read MoreToday was my first full day in Warsaw, Poland. It's raining here today, so I had to go back to change shoes. When I got back to the main street, to walk to Old Town, a protest of some kind had begun.
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