In this x-ray photo provided by NASA, the sun is shown early in the morning of Sunday, Aug. 1, 2010. The dark arc near the top right edge of the image is a filament of plasma blasting off the surface _ part of the coronal mass ejection. The bright region is an unassociated solar flare. When particles from the eruption reach Earth on the evening of Aug. 3-4, they may trigger a brilliant auroral display known as the Northern Lights. (AP Photo/NASA)
This undated frame grab image taken from files made available by IntelCenter and taken from a video posted on a pro-rebel Web site Wednesday March 31, 2010, purports to show Chechen militant leader Doku Umarov. The leader of Chechnya's separatist militants, who claimed responsbility for the Moscow subway bombings that killed 40 people in March, has announced in a purported video posted on YouTube on Sunday, Aug. 1, 2010, that he is stepping down. (AP Photo/IntelCenter, File)
FILE - This undated file photo provided by Verizon Wireless shows the Blackberry Pearl smart phone. The United Arab Emirates said Sunday Aug. 1, 2010 it plans to block some messaging and web services on BlackBerry smart phones beginning in October. UAE authorities said last week BlackBerry services could pose a threat to national security. (AP Photo/Verizon Wireless/File)
This screen shot taken from the microblogging site Twitter.com early Sunday morning Aug. 1, 2010 shows the Twitter page that greeted users announcing Twitter being down for planned maintenance. According to Twitter the maintenance is scheduled between 2 a.m. 7 a.m. EDT Sunday. As such in that time some users will not be able to access Twitter. (AP photo)
FILE - This Feb. 19. 2010 file photo provided by NASA shows the International Space Station with Earth's horizon as a backdrop. Several power systems have been shut down aboard the International Space Station after a cooling system malfunctioned. NASA says in a posting on its website that one of two cooling loops aboard the space station was shut down Saturday, July 31, 2010. A module that pumps ammonia coolant to prevent equipment from overheating was still shut down early Sunday, Aug. 1. (AP Photo/NASA, File)
In this July 30, 2010 photo, a man pushes his bike across a pedestrian's overpass while cars heading in town jam on the road during morning commuting in Beijing, China. China is set to overtake Japan as the world's second largest-economy in a resurgence that is changing everything from the global balance of military and financial power to how cars are designed.
A salesclerk adjusts Sanyo's eneloop rechargeable batteries on display at Yamada Denki LABI electric shop in Tokyo, Thursday, July 29, 2010. Panasonic is planning to take 100 percent ownership of its subsidiaries Sanyo Electric and Panasonic Electric Works in a move costing up to $9.4 billion to strengthen green businesses such as electric cars and solar panels. (AP Photo/Shuji Kajiyama)
A man looks at new PlayStation 3 on display at Yamada Denki LABI electric shop in Tokyo, Thursday, July 29, 2010. Sony bounced back to profit last quarter and raised its full-year earnings forecast, fueled by stronger demand for its PlayStation 3 gaming consoles, personal computers and televisions.(AP Photo/Shuji Kajiyama)
Apple CEO Steve Jobs (left) talks to a friend using the FaceTime video chat feature on the iPhone 4 during the Apple Worldwide Developers Conference in June. Adult-entertainment companies are developing video-sex-chat services to use with FaceTime.
Apple CEO Steve Jobs talks about free protective cases for Apple iPhone 4 users during a news conference, Friday, July 16, 2010, at the company's headquarters in Cupertino, Calif. Apple Inc. (AP Photo/Paul Sakuma)
Comcast logos are displayed on installation trucks in Pittsburgh, Tuesday, Feb. 15, 2011. Comcast Corp., a leading cable, entertainment and communications company, announced Wednesday, Feb. 16, that the company's planned annual dividend has increased 19% to $0.45 per share. (AP Photo/Gene J. Puskar)
FILE - In this Monday, Oct. 26, 2009 file photo, a sign hangs outside a Sprint store in Saugus, Mass. Sprint Nextel Corp. on Wednesday, Oct. 27, 2010, reported the first quarterly increase in three years, as improvements in Sprint-branded and prepaid service offset the continued flight of subscribers from the Nextel network. (AP Photo/Lisa Poole, file)
The Titanic wreckage has been photographed multiple times since its 1985 discovery, but a team of scientists will launch what is billed as the most advanced scientific mission to date to assess its deteriorating condition and create a detailed three-dimensional map that will "virtually raise the Titanic" for the public. (Ralph White via Associated Press)