LEADING THE DAY: Google has received a “second request” from the U.S. Justice Department regarding its planned acquisition of Motorola Mobility. As the company expands its online dominance of the Web, it’s drawn more scrutiny from government regulators and lawmakers.

In a company blog post, Google Senior Vice President Dennis Woodside said that both companies would cooperate and work with Justice on the review. Google has received second requests for its planned mergers in the past, including for its recent acquisition of ITA, the travel software company.

Amazon introduces Kindle Fire: Amazon introduced a low-cost tablet, the Kindle Fire, at an event Wednesday. It will retail for $199. The move was a first hit against Apple and the success it’s seen in the tablet market with the iPad, The Washington Post reported. The iPad has dominated the high end of the tablet market, and the Fire, armed with a massive retailing operation and a vast catalogue of movies, books and music, could be Amazon’s in to taking over the low end of the market, analysts said.

Media groups challenge open Internet rules: Free Press, a Massachusetts-based media group, has filed suit opposing the Federal Communications Commission’s open Internet rules in the First Circuit Court of Appeals in Boston. Access Humboldt, a nonprofit media group in California, has also petitioned the Ninth Circuit Court of Appeals for review of the order.

Both groups said the order fails to protect mobile Web users. The rules discriminate “between Internet access via mobile devices like smart phones and Internet access via fixed platforms like cable and telephone,” Access Humboldt wrote in a press release.

Lawmakers ask for Facebook probe: Reps. Ed Markey (D-Mass.) and Joe Barton (R-Tex.) have asked the Federal Trade Commission to look into Facebook’s business practices, with particular regard to the way the company handles privacy. The lawmakers, who co-chair the House privacy caucus, raised concerns over reports that Facebook gathers information about its users even after they have logged out. The company has said that it does use cookies to monitor users when they are logged out of their accounts but does not collect information for advertisers. Cookies the company said had inadvertently collected some unique information have been fixed.

U.S. government may try Google Apps: The U.S. Government may look into using Google Apps as an alternative to Microsoft’s products approved for government use, the Next Web reported. Google and Microsoft, which has a strong hold on the government market, have been at odds over whether or not Google’s program had the proper certification — under the Federal Information Security Management Act (FISMA) — to be used by the U.S. government. This recent decision sets the stage for more competition in the market for government cloud and other office services.

Child privacy:The House subcommittee on commerce, manufacturing and trade has scheduled a hearing on “Protecting Children’s Privacy in an Electronic World.” The hearing is set for Oct. 5. The committee has not yet released the witness list.

Nokia layoffs: Nokia announced Thursday that it will cut 3,500 more jobs by 2012. The company will close a factory in Cluj, Romania, and consolidate parts of its Location and Commerce business. The planned layoffs are in addition to the company’s previous plans to lay off 7,000 workers in April, the Associated Press reported. According to the report, the company employs 132,500 people.