Traders at work at ETX Capital work in central London on Monday. Financial markets in the U.K. and around the world have been in turmoil since the Brexit vote last week.
Daniel Leal-Olivas/AFP/Getty Images
British Prime Minister David Cameron delivers a speech on the upcoming EU referendum in London on June 7. Concerns about a possible "Brexit" from the EU have rattled financial markets.
WPA Pool/Getty Images
A Sig Sauer MCX rifle can be seen on display at the top left of this photo as NRA gun enthusiasts view the Sig Sauer display at the National Rifle Association's annual meetings & exhibits show in Louisville, Ky., in May.
John Sommers II/Reuters