Senate hearings on the campaign-finance scandal opened. Committee Chairman Sen. Fred Thompson, R-Tenn., announced that he had evidence of a Chinese plot to infiltrate the United States, but couldn't say more because the evidence is top secret. Ranking Democrat John Glenn, D-Ohio, indirectly accused Thompson of McCarthyism and upstaged him by announcing an offer from John Huang to testify in exchange for partial immunity. Republicans worried that an immunity grant might let Huang off the hook, à la Ollie North. Hours later, Republicans (including Rep. Dan Burton, the chairman of the House committee investigating the scandal) toasted North at a gala in his honor. The early line is that the hearings aren't catching fire. For Slate's take, see Jacob Weisberg's "Dispatch." (7/9) Doctors reported that fenfluramine and phentermine, a popular diet pill combination, may cause severe heart-valve disease . The story is all over front pages and the TV news because the pills are prescribed about 20 million times a year. The Food and Drug Administration is sending warnings to thousands of doctors. The news cycle on drug scares has become so fast that the backlash (accusing the new report of over-hyping the heart-disease link and ignoring the benefits of reduced obesity) is already underway. (7/9) NASA landed a robot on Mars and began exploring the surface. Scientists are steering the 2-foot-long, 23-pound robot by remote control (from 119 million miles away) and downloading the video and geological data it collects. Evidence of ancient flood water (which might now be frozen at the poles or beneath the planet's surface) and signs of repeated melting and crystallization of the planet's crust indicate that Mars is much more like Earth than was previously thought. The mission's official Web site has reportedly surpassed 150 million hits in five days, making it the busiest site in the history of the Web. (7/9) Cambodia 's second prime minister staged a successful coup against the country's first prime minister. The victors began looting, and hunting down the new leader's political rivals, one of whom has already been executed. Analysts foresee two possible outcomes: brutal tyranny (the optimistic scenario) or bloody civil war. This follows Cambodia's history of: 1) massive genocide; 2) a decade-long civil war; and 3) billions of dollars in foreign aid to restore democracy, which now seem to have been wasted. (7/9) Boxing regulators revoked Mike Tyson's license to fight and fined him $3 million for biting off part of Evander Holyfield's ear. Tyson can apply for reinstatement in a year. Optimists called the penalty stiff and predicted that it would restore some standard of decency to the sport. Pessimists pointed out that Tyson gets to keep $27 million he earned from the fight and can take his services overseas. Fans rated the bite the most disgusting offense in the history of sports. (7/9) Mexico's ruling party lost control of the national assembly for the first time in 68 years. It was the longest-reigning political party in the world. Reasons for the defeat: 1) Voters were sick of the country's lousy economy; 2) they were sick of the ruling party's tradition of rigging elections; and 3) this time, the ruling party neglected to rig the election. President Ernesto Zedillo executed one of history's most impressive post-election spin jobs, portraying his party's defeat as proof of the climate of freedom and democracy he has fostered. Now that the party has lost its grip, analysts foresee a wave of opportunistic defections by politicians, as happened to Southern Democrats in the United States. (7/9) Sports news: Cleveland Indians catcher Sandy Alomar Jr. won baseball's All-Star Game for the American League with a two-run, seventh-inning home run in his team's ballpark. Martina Hingis and Pete Sampras won the women's and men's tennis championships at Wimbledon . Sportswriters lionized Hingis as a Wunderkind (she's 16, the youngest Wimbledon champ in a century) and Sampras as arguably the greatest player ever (he's on track to shatter the record for men's grand slam titles). Women's runner-up Jana Novotna choked away a third-set lead in the finals for the second time but managed (unlike last time) not to cry on the shoulder of the Duchess of Kent. (7/9) Miscellany: NATO formally admitted Poland, Hungary, and the Czech Republic . The United States successfully pressured its allies to postpone a similar decision on Romania and Slovenia until 1999. The investigation of Michael Kennedy's alleged affair with his kids' teen-age baby sitter is being dropped because the baby sitter won't cooperate. Hawaiian legislators decided to give domestic-partnership benefits to gay couples instead of letting them marry. Lockheed Martin announced its purchase of Northrop Grumman, completing the defense industry's consolidation into two camps ( Lockheed vs. Boeing ). The British company that recently won fame for cloning a sheep is reportedly on the verge of deriving human blood plasma from sheep and cows. A new scientific report claims that puberty begins as early as the age of 6. A woman in North Carolina was charged with murdering her son by whacking him with a computer keyboard. (7/9) The British finally relinquished Hong Kong to China. Thousands of U.S. journalists found excuses to spend the week there, playing up the possibilities of political confrontation and violence (China oafishly sent thousands of troops to show everyone who's the boss) before conceding that nothing was going to happen. Poorest excuse for a reporter's travel expenses: "Hong Kong Ponders Meaning of Record Rainfall" ( Los Angeles Times ). Pundits agreed that capitalism will continue to flourish there even if democracy doesn't: The New York Times ' Tom Friedman noted that replicas of the "Goddess of Democracy" (erected in 1989 by protesters in Tiananmen Square), which were being peddled by Hong Kong demonstrators, were "Made in China." (7/7) Jimmy Stewart, Robert Mitchum , and Charles Kuralt died. Hollywood pundits contrasted Stewart (the idealistic gentleman) with Mitchum (the hard-living rogue) and juxtaposed both of them--"the last of the giants of Hollywood's golden era," said the Los Angeles Times-- with today's mediocre movie stars. Cultural commentators paired Stewart with Kuralt as champions of virtue and the common man. Television journalists ceaselessly glorified Kuralt's television journalism. (7/7)