President Barack Obama's trip to Argentina "reflects President Macri's determination to re-engage the international community", points out AS/COA's Susan Segal.

The parched strip of land where Mexico drew the line on U.S. expansionism.

The United States must reaffirm its position as a close friend to Colombia, writes COA’s Christian Gómez, Jr. for U.S. News & World Report.

The Colombian president will ask the United States to shift toward implementing a peace agreement with the FARC.

COA Vice President Eric Farnsworth testifies before the U.S. Senate Committee on Foreign Relations.