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WASHINGTON, July 7 (Xinhua) -- Space shuttle Atlantis will soar into the sky Friday on NASA's 135th and final flight. Its scheduled return to Earth later this month will mark the end of NASA's 30-year space program.Since its onset with the launch of space shuttle Columbia, the program has been seen as a cheap, safe and reliable way for space exploration.Despite its great contributions to U.S. manned space flight, it has also left some grave and tragic lessons, making its termination inevitable.HIKING COSTSLaunched in 1972 by then President Richard Nixon, the shuttle program aimed to provide a new system of affordable space travel and proved to be NASA's most enduring project in its 50 years of existence.In 1981, shuttle Columbia made its first shuttle flight for two days. It was the ultimate hybrid and the first reusable spacecraft.Launched like a rocket and gliding back to Earth like an airplane, space shuttles not only can act as a space taxi to carry astronauts, but have the muscle of a long-distance trucker to haul heavy machinery.The spaceship boasts more than 3,500 subsystems and 2.5 million parts and is nine times faster than a speeding bullet as it climbs heavenward. That versatility, however, has translated into higher costs.NASA originally estimated the program would cost about 90 billion U.S. dollars. However, its actual cost stands at about 200 billion dollars, compared with the 151 billion dollars spent on Apollo which took Americans to the moon in 1969.In an article in Technology Review, John Logsdon, former head of the Space Policy Institute at George Washington University, drew a direct connection between the ravenous shuttle budget and the lack of other large advances in manned space flight."By operating the system for 30 years, with its high costs and high risk, rather than replacing it with a less expensive, less risky second-generation system, NASA compounded the original mistake of developing the most ambitious version of the vehicle," he wrote."The shuttle's cost has been an obstacle to NASA starting other major projects," he added.HIGH RISKIn terms of safety, the shuttles have never been as reliable as their designers had envisioned.On average, one out of every 67 flights ended up with fatal accidents. Based on the rate of deaths per million miles traveled, the space shuttle is 138 times riskier than a passenger jet.Seven astronauts onboard died when Challenger exploded about a minute after launch in 1986. Nearly two decades after the tragic blast, a new catastrophe descended when the shuttle Columbia disintegrated moments before landing in 2003, killing another seven spacemen.Again, the shuttle program was shelved for more than two years as NASA stepped up efforts to make it safer. But experts say the fundamental problem related to shuttles' safety cannot be solved due to their "birth defects.""It is in the nation's interest to replace the Shuttle as soon as possible," concluded the panel that investigated the 2003 Columbia accident.

BEIJING, July 11 (Xinhuanet) -- The pace of China's import growth in June fell to its lowest level in 20 months as tightening monetary policies kicked in, resulting in the biggest monthly trade surplus this year, official statistics show.Import growth is expected to slow in the coming months, thanks to the broad impact of the tightening measures, before picking up in the last quarter, economists predicted.According to the General Administration of Customs (GAC), imports rose 19.3 percent, from a year earlier, to 9.7 billion, the weakest since November 2009.Exports rose 17.9 percent and despite this being the smallest increase since last December they reached a record high of 1.9 billion.The decline in import growth has led to a widening trade surplus, .3 billion in June compared to .1 billion in May. But in the first six months the trade surplus dropped 18 percent, year-on-year, to .9 billion."Import growth was weaker than expected, as imports for China's processing trade weakened and de-stocking in heavy industry continued," Wang Tao, head of China Economic Research at UBS Securities, said."Recent commodity price drops, including crude oil, also helped lower the import bill," she added.June's net imports of crude oil fell 12 percent from May to 19.43 million metric tons, the lowest since October, amid refinery maintenance and slowing energy demand, according to the GAC figures."Decelerating economic growth and tightening measures to soak up market liquidity have reined in import growth, but it is not a cause for worry," Li Wei, an economist at Standard Chartered Shanghai, said.The government is expected to announce economic growth data for the second quarter on Wednesday. Gross domestic product growth is widely predicted to slow from 9.7 percent for the first quarter."The slowdown in import growth will last two to three months or even longer due to both falling demand and possible commodity price drops," Li said.Zhong Shan, vice-minister of commerce, said recently that imports will slow down in the second half, citing the government's measures to cool the economy.The central bank has raised interest rates five times since mid-October, with the latest on July 7, and increased the reserve requirements for commercial banks, the amount they have to set aside, nine times since November. The consumer price index, a major gauge of inflation, surged to 6.4 percent last month, the highest in three years.Zhao Fudi, GAC spokesman, said in an online broadcast on Sunday that higher prices are increasing inflationary pressure, leading to a 14.7 percent gain in the overall price of imported commodities in the first half.Imports surged 27.6 percent year-on-year to 9.4 billion from January to June, as commodity prices rose during the first half. Exports increased 17.9 percent in June, down from 19.4 percent in May."This is because of weaker external demand" from developed nations, Wang said.Exports increased 24 percent, year-on-year, to 4.3 billion during the first half, but exports to both the United States and the European Union, China's two major trading partners, rose by only 16.9 percent."The slow recovery of the global economy and the European debt crisis have added uncertainties to export growth," Zheng Yuesheng, head of the GAC statistics department, said.Lu Zhengwei, chief economist at Industrial Bank, believes that the March earthquake and tsunami in Japan hurt China's exports."The disaster cut off China's imports of parts and components used for mechanical and electrical goods, leading to a decline in those exports" which make up a majority of China's exports, Lu said.As Japanese manufacturers resume full production, or come close to it, in September, China's exports will regain momentum, he predicted.Li Wei agreed. "China's exports keep pace with the global economic recovery. And growth will probably see a turnaround in September" when orders for the Christmas season are usually made, Li said.Many companies in China's coastal regions are far from optimistic, citing rising costs in labor and raw materials and yuan appreciation, as well as shrinking demand abroad.Han Jie, deputy director general of the department of commerce in Zhejiang province, said "exporters in Zhejiang have experienced a disappointing first half, and the second half will not be better".

BEIJING, July 17 (Xinhua) -- Iraqi Prime Minister Nouri al-Maliki arrived in Beijing Sunday night for his first official visit to China as a guest of his Chinese counterpart Wen Jiabao.During al-Maliki's stay in China from Sunday to Thursday, President Hu Jintao will meet with him, and Premier Wen will hold talks with the Iraqi prime minister, Chinese Foreign Ministry spokesman Hong Lei said earlier.China and Iraq share a traditional friendship, Hong said, adding that the two countries have witnessed smooth development of bilateral relations, steadily growing economic cooperation and increasing cultural exchanges."China is ready to work with the international community and to continue to provide assistance for the Iraqi people to improve their livelihoods," said the spokesman.

COPENHAGEN, May 29 (Xinhua) -- The number of confirmed E.coli cases has risen to 11 with at least another eight persons suspected of having the intestinal infection in Denmark, according to Denmark's National Serum Institute on Sunday.Five of the confirmed cases show symptoms of kidney failure which marks an advanced stage of the sickness, the institute said.Danish cucumbers are suspected of helping spread the E. coli bacteria believed to be causing a deadly outbreak of intestinal infection in Denmark and Germany, local media reported Sunday.The Danish cucumbers were mixed in Germany with cucumbers originating in the Netherlands, making it difficult to determine if Danish cucumbers are in fact contaminated.Denmark's Veterinary and Food Administration (DVFA) had earlier said the suspicion against Danish cucumber was "vague", but advised Danish consumers not to eat raw tomatoes, lettuces and cucumbers from Germany, and cucumber from Spain.It is now checking Danish cucumbers for traces of E. coli with results expected on Tuesday.Some Danish retailers have now removed these products from their supermarket shelves. And the Danish branch of fast-food chain McDonald's announced Saturday that it was dropping fresh cucumbers from its menu until further notice.The infection, which is food-borne, can be caused by eating raw or uncooked foods such as vegetables contaminated with the E. coli bacteria.Symptoms of infection include mild fever, bloody diarrhea and vomiting, and can last five to seven days. It can prove fatal in the very young, sick, or elderly.