On Wednesday, both those backing a Brexit and those pushing for the status quo took to the famed Thames.
A flotilla of fishing boats backing a Brexit sailed under London's Tower Bridge. A counter-demonstration — with the help of singer and activist Bob Geldof — used dinghies and banners to spread the "In" message.
Cassandra Vinograd is a Senior Writer and News Editor. Before joining NBC News, she worked as a London-based correspondent for The Associated Press and specialized in politics, foreign affairs and defense.
Vinograd previously worked as an editor for The Wall Street Journal in Brussels and London.
She has reported extensively from Afghanistan and on West Africa and the Middle East.