China's air force will deploy 18 aircraft to spray cloud dispersal chemicals into the atmosphere around Beijing, while "48 fog dispersal vehicles" will use similar technology at airports around the capital, the Global Times reported.
"It is the first time in Chinese history that artificial weather modification on such (a) large scale has been attempted," the paper quoted Cui Lianqing, an air force meteorologist, as saying.
"There are still a lot of uncertainties with the weather, and sometimes people can't work against nature ... but we are trying our best."
China is planning a massive parade, song and dance performances and fireworks at Tiananmen Square on October 1 to mark the day when revolutionary leader Mao Tse-tung proclaimed the state's founding in 1949.
Clear weather is especially important for the military parade, which will include a flyover by the nation's most advanced fighter jets, the report said.
The capital made similar efforts for the opening ceremony of the 2008 Beijing Olympics when more than 1100 "rain dispersal rockets" were fired into the skies to break up clouds around the Bird's Nest National Stadium.
In addition to air force efforts, the Beijing Weather Modification Office is also prepared to implement similar cloud dispersal measures ahead of October 1, Xinhua news agency has reported.
Remote satellite technology will be employed to help monitor weather changes and adjust modification measures, the report said.
Weather records show that there is a 30 per cent chance of rain on October 1, but precipitation has been light on most recent National Days, it added.
NATO-led forces are investigating the death of four Marines in eastern Afghanistan after their commanders reportedly rejected requests for artillery fire in a battle with insurgents, the Pentagon said on Wednesday.
Tuesday's incident was "under investigation" and details remained unclear, press secretary Geoff Morrell told a news conference.
A McClatchy newspapers' journalist who witnessed the battle reported that a team of Marine trainers made repeated appeals for air and artillery support after being pinned down by insurgents in the village of Ganjgal in eastern Kunar province.
The U.S. troops had to wait more than an hour for attack helicopters to come to their aid and their appeal for artillery fire was rejected, with commanders citing new rules designed to avoid civilian casualties, the report said.
Morrell said the helicopters were not hampered by any restrictions on air power but had to travel a long distance to reach the Marines at the remote location near the Pakistan border.
"I think that it did take some time for close air support to arrive in this case, but this is not a result of more restrictive conditions in which it can be used," he said.
"It was the result, as is often the case in Afghanistan, of the fact that there are great distances often between bases where such assets are located and where our troops are out operating."
Morrell could not confirm whether appeals for artillery fire were denied by commanders.
According to the McClatchy report by Jonathan Landay, the U.S. advisors assisting Afghan forces had been assured before the operation that "air cover would be five minutes away."
The incident comes after the top commander of U.S. and NATO forces in Afghanistan, General Stanley McChrystal, issued new restrictions on the use of military force and air raids in a bid to prevent civilian deaths.
McChrystal has warned that civilian casualties caused by the NATO-led force risk alienating the Afghan population and jeopardizing the war effort.
But the general and other top military officials have insisted air support and fire power would not be restricted when U.S. troops were under direct threat.
Bombing runs by coalition forces have declined sharply since McChrystal took over command in June, U.S.A Today reported on Wednesday, citing military statistics.
Tuesday's firefight in eastern Afghanistan involved a 13-member team of U.S. Marine and Army trainers assigned to the Afghan national army, the report said.
Eight Afghan soldiers and police and an Afghan interpreter also died in the battle, which lasted for hours with insurgents unleashing a barrage of gunfire and rockets from mountain positions, the report said.
When an Afghan soldier demanded helicopter gunships, U.S. Major Kevin Williams replied through an interpreter: "We are pinned down. We are running low on ammo. We have no air. We've lost today."
The Americans were assisting Afghan forces in an operation that called for Afghans searching the hamlet for weapons and then meeting village elders to plan police patrols.
But U.S. officers suspected insurgents were tipped off about the operation beforehand, as the coalition and Afghan forces were ambushed as they approached the outskirts of the hamlet at dawn, the report said.
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