WASHINGTON Nike Air Max 95 Sale , May 31 (Xinhua) -- U.S. President Donald Trump condemned the massive bomb attack in the Afghan capital of Kabul in which at least 80 people were killed, the White House said on Wednesday.


According to a White House statement, Trump condemned the attack and the U.S. Embassy was offering assistance to the Afghan government to hunt down those responsible for the attack in his talks with his Afghan counterpart Ashraf Ghani.


The powerful car bomb exploded on Wednesday in central Kabul, where several diplomatic representative offices, official institutions as well as the Presidential Palace are located Nike Air Max 90 Sale , killing at least 80 people and injuring over 350 others.


The attack came at a time when Trump was still mulling over the U.S. troop increase in Afghanistan.


U.S. media cited U.S. officials who spoke on condition of anonymity as saying that nine Afghan guards in the U.S. Embassy in Kabul were killed and 11 U.S. contractors wounded.


White House spokesman Sean Spicer confirmed on Wednesday at a daily briefing that the Trump administration was aware that multiple Americans were injured.


The attack, one of the worst since the drawdown of foreign forces from Afghanistan in 2014, came at a time when the U.S. authorities were issuing stern warnings that security situation in Afghanistan was heading for the worse.


Speaking at a Senate hearing earlier this month, U.S. National Intelligence Director Dan Coats warned that the situation in Afghanistan would most likely deteriorate through 2018 even if the United States and its allies offer more military aid.


Coats' warning and Wednesday's deadly attack also came as Trump was still considering whether or not to send additional hundreds of U.S. troops to Afghanistan.


Former U.S. President Barack Obama had planned to reduce the current number of 9,800 U.S. troops in Afghanistan to some 5 Nike Air Max 1 Sale ,500 by the end of 2015 and withdraw all troops by the end of 2016 when his presidency came to an end.


However, given the deteriorating security situation in Afghanistan, the former Obama administration repeatedly postponed the withdrawal.


Currently, about 8,400 U.S. troops and another 5 Nike Air Max Sale ,000 forces of the North Atlantic Treaty Organization (NATO) were deployed on the ground in Afghanistan to train and assist the Afghan forces against the Taliban, and conduct counter-terrorism missions.


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WASHINGTON, Nov. 1 (Xinhua) -- Long-duration spaceflight may lead to "significant changes" in the structure of astronauts' brains, a U.S. study said Wednesday.


Many astronauts have been known to have experienced altered vision and increased pressure inside their heads during spaceflight aboard the International Space Station, a phenomenon known as visual impairment and intracranial pressure syndrome Air Max 95 Sale , or VIIP syndrome for short.


Given safety concerns and the potential impact to human exploration goals, the U.S. space agency NASA has made determining the cause of VIIP syndrome and how to resolve its effects a top priority.


"We know these long-duration flights take a big toll on the astronauts and cosmonauts," Donna Roberts, a neuroradiologist at the Medical University of South Carolina, who led the study Air Max 90 Sale , said in a statement.


"However, we don't know if the adverse effects on the body continue to progress or if they stabilize after some time in space," Roberts said. "These are the questions that we are interested in addressing, especially what happens to the human brain and brain function?"


In the new study, Roberts and colleagues compared the brain images of 18 astronauts who had been in space for short periods of time aboard the U.S. Space Shuttle to those of 16 astronauts who had been in space for longer periods of time Air Max 1 Sale , typically three months, aboard the International Space Station.


They evaluated the cerebrospinal fluid (CSF) spaces at the top of the brain and CSF-filled structures, called ventricles, located at the center of the brain.


In addition, the researchers paired the preflight and postflight magnetic resonance imaging (MRI) cine clips from high-resolution 3-D imaging of 12 astronauts from long-duration flights and six astronauts from short-duration flights and looked for any displacement in brain structure.


Study results confirmed a narrowing of the brain's central sulcus Air Max Sale , a groove in the cortex near the top of the brain that separates the parietal and frontal lobes, in 94 percent of the astronauts who participated in long-duration flights and 18.8 percent of the astronauts on short-duration flights.


Cine clips also showed an upward shift of the brain and narrowing of the CSF spaces at the top of the brain among the long-duration flight astronauts but not in the short-duration flight astronauts.


In ground-based experiments that required participants to stay in bed and keep their heads continuously tilted in a downward position to simulate the effects of microgravity for 90 days, the team also saw evidence of brain shifting and a narrowing of the space between the top of the brain and the inner table of the skull.


These results confirmed that "significant changes in brain structure occur during long-duration space flight," the researchers said.


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