It's hard to find a place in Mexico more transformed by the North American Free Trade Agreement than Tijuana. The border city has exploded in growth since the trade pact was signed in 1993.
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Protesters demonstrate against the Transatlantic Trade and Investment Partnership in Germany, in April. Officials conceded that opposition to trade agreements is building on both sides of the Atlantic.
A container ship is unloaded at the Port of Los Angeles. Voters in this year's presidential election have deep feelings about trade — and often are at odds with each other about it.
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Activists hold a rally to protest the Trans-Pacific Partnership trade agreement in front of the White House on Feb. 3. Trade has become a key issue in the U.S. presidential campaign.
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