The crew members aboard the USS Underwood could see through their night goggles what was happening on the fleeing go-fast boat: Someone was dumping bales.
When the Navy guided-missile frigate later dropped anchor in Panamanian waters on that sunny August morning, Ensign Clarissa Carpio, a 23-year-old from San Francisco, climbed into the inflatable dinghy with four unarmed sailors and two Coast Guard officers like herself, carrying light submachine guns. It was her first deployment, but Carpio was ready for combat.
Fighting drug traffickers was precisely what she'd trained for.
In the most expensive initiative in Latin America since the Cold War, the U.S. has militarized the battle against the traffickers, spending more than $20 billion in the past decade. U.S. Army troops, Air Force pilots and Navy ships outfitted with Coast Guard counternarcotics teams are routinely deployed to chase, track and capture drug smugglers.
The sophistication and violence of the traffickers is so great that the U.S. military is training not only law enforcement agents in Latin American nations, but their militaries as well, building a network of expensive hardware, radar, airplanes, ships, runways and refueling stations to stem the tide of illegal drugs from South America to the U.S.
According to State Department and Pentagon officials, stopping drug-trafficking organizations has become a matter of national security because they spread corruption, undermine fledgling democracies and can potentially finance terrorists.
U.S. drug czar Gil Kerlikowske, pointing to dramatic declines in violence and cocaine production in Colombia, says the strategy works.
"The results are historic and have tremendous implications, not just for the United States and the Western Hemisphere, but for the world," he said at a conference on drug policy last year.
The Associated Press examined U.S. arms export authorizations, defense contracts, military aid, and exercises in the region, tracking a drug war strategy that began in Colombia, moved to Mexico and is now finding fresh focus in Central America, where brutal cartels mark an enemy motivated not by ideology but by cash.
The U.S. authorized the sale of a record $2.8 billion worth of guns, satellites, radar equipment and tear gas to Western Hemisphere nations in 2011, four times the authorized sales 10 years ago, according to the latest State Department reports.
Over the same decade, defense contracts jumped from $119 million to $629 million, supporting everything from Kevlar helmets for the Mexican army to airport runways in Aruba, according to federal contract data.
Last year $830 million, almost $9 out of every $10 of U.S. law enforcement and military aid spent in the region, went toward countering narcotics, up 30 percent in the past decade.
Many in the military and other law enforcement agencies - the Drug Enforcement Administration, U.S. Immigration and Customs Enforcement, FBI - applaud the U.S. strategy, but critics say militarizing the drug war in a region fraught with tender democracies and long-corrupt institutions can stir political instability while barely touching what the U.N. estimates is a $320 billion global illicit drug market.
Congressman Eliot Engel (D-N.Y.), who chaired the U.S. House Subcommittee on the Western Hemisphere for the past four years, says the U.S.-supported crackdown on Mexican cartels only left them "stronger and more violent." He intends to reintroduce a proposal for a Western Hemisphere Drug Policy Commission to evaluate antinarcotics efforts.
"Billions upon billions of U.S. taxpayer dollars have been spent over the years to combat the drug trade in Latin America and the Caribbean," he said. "In spite of our efforts, the positive results are few and far between."