Source: Associated Press By ANITA SNOW MEXICO CITY (AP) Mexico is overhauling its troubled drugfighting program, creating a new agency, setting up an organized crime unit and in the days before President Clinton's visit beefing up field operations. On Wednesday, police confiscated 10.7 tons of cocaine in a truck heading toward the U.S. border in the largest seizure in Mexico since 1990. Clinton is to arrive on May 5 for a threeday visit. U.S. officials say they are pleased with Mexico's renewed antidrug efforts, and are confident they now have a core group of Mexican agents they can trust on sensitive cases. But they warn much more needs to be done. Widespread corruption still runs through Mexican law enforcement agencies, and counternarcotics agents are especially vulnerable to bribes because of the large amounts of money traffickers spend for protection. Mexico's new antidrug agency will replace the corruptionridden National Institute for the Combat of Drugs. A U.S. official said on condition of anonymity that it will open in the next several weeks. The new agency its name has not been announced will be led by a special prosecutor who will report to the attorney general. For months, U.S. officials have been quietly suggesting that Mexico replace the institute. A panel of leading Mexican jurists recommended the move this month, telling President Ernesto Zedillo that the 3yearold institute ``has been in an advanced state of deterioration ever since it was founded.'' The institute's head, army Gen. Jesus Gutierrez Rebollo, was fired in February after authorities charged him with being on the payroll of Mexico's No. 1 cocaine trafficker, Amado Carrillo Fuentes. Mexico vowed to revamp its drug fighting effort after the embarrassing arrest of Gutierrez Rebollo, which came just weeks before the deadline for Clinton to recommend to Congress whether to recertify Mexico as a drugfighting country worthy of continued U.S. aid. Mexico was recertified after contentious debate by American lawmakers. American law enforcement agencies have been training small groups of Mexican agents they hope will bolster the joint campaign against illegal drugs, the New York Times reported Thursday. The unit described by the Times appears to be the new organized crime unit, which U.S. officials say began operating in the Mexican capital several months ago. The unit, which will report directly to the attorney general, focuses on drugrelated crimes such as money laundering and the trafficking of precursor chemicals used to manufacture narcotics, the U.S. official said. It was established by a new antiracketeering law that set up a witness protection program, authorizes wiretaps on suspects' telephones and lets prosecutors try suspects under broader crimes such as conspiracy. Its 45member staff eventually is expected to grow to 115. Prospective agents for the new agency are undergoing drug and psychological tests as well as extensive background, financial and even polygraph tests, the U.S. official said. It will employ up to 1,500 agents. Mexico has been conducting widespread roadside inspections over the last two years to search for stolen vehicles, illegal weapons and drugs. Authorities said they were intensifying field operations before Clinton's visit. The huge cocaine load was seized Wednesday at a checkpoint in San Fernando, about 110 miles south of the border town of Reynosa. Authorities originally estimated its weight at several tons less than what it turned out to be when it was weighed Thursday, the attorney general's office said.