Three Apple executives, CEO Tim Cook, CFO Peter Oppenheimer, and head of tax operations Phillip A. Bullock, appeared in front of the U.S. Senate Permanent Subcommittee on Investigation earlier today, testifying about Apple's tax policies.

Following this morning's acquisition of Tumblr, Yahoo today hosted an event in New York City to detail changes to its popular photo sharing site Flickr . Flickr on the web has been given a major design overhaul, with a focus on full resolution pictures. In addition to eliminating much of the white space on the site, Flickr is now displaying in-line photo streams that encompass the majority of the screen and detailed photo-centric profile pages

A Senate subcommittee has released a 40-page memo accusing Apple of not paying billions of dollars in federal taxes through "extensive tax-avoidance strategies". Apple CEO Tim Cook, CFO Peter Oppenheimer, and Apple's head of tax operations Phillip A.

As noted by AppleInsider , MacBook Air supplies are beginning to dry up as Apple's annual Worldwide Developers Conference approaches. Currently, the 13.3-inch 256GB 1.8Ghz MacBook Air is out of stock at Amazon.com, with a listed one to two month waiting period.

Reuters is reporting that Apple has responded to the Justice Department's accusations that the company colluded with publishers to increase e-book pricing, saying that it negotiated with the publishers separately and reached different agreements with each. But Apple said the publishers had decided, independent of Apple, to eliminate discounts on wholesale book prices of e-books, to sell lucrative hardcover books first to bookstores in a practice called windowing and to take other measures to push Amazon to raise prices. In a court filing dated April 26 but released on Tuesday, Apple said it had approached publishers to create an online bookstore that would eventually become the iBookstore and had demanded a 30 percent commission, that publishers would not undercut prices paid to Apple, and that "windowing" be scrapped

Popular free messaging app LINE was forced to remove one of its key sticker features today, eliminating the ability for its users to purchase and send sticker sets as gifts to friends.

CIO reports on an Interop keynote presentation yesterday by PayPal chief information security officer Michael Barrett in which he discussed the future of account security and suggested that passwords and PINs will soon be a thing of the past. Barrett currently serves as president of the Fast Identity Online (FIDO) Alliance that is seeking alternatives to these traditional security methods. The FIDO Alliance protocol allows users a choice of authentication method while shifting control to providers who can make authentication user-transparent and limit the risk of fraud

A fourteen-year-old has discovered that the tiny magnets inside the iPad can inadvertently shut off pacemakers if the device is left on the chest, such as might happen if the user falls asleep with the iPad lying on them. Apple builds magnets into every iPad it sells for use with its Smart Cover accessory .

Pegatron, a contract manufacturer for Apple that makes the iPad mini and the iPhone 4S, among other products, said today that its second quarter consumer electronics revenue will drop 25 to 30 percent from the previous quarter, reports Bloomberg . The company says there is a decline in revenue from iPad mini production is "more on demand, while price has been stable", but CEO Jason Cheng also noted that "almost every item is moving in a negative direction" for the quarter. "Not just tablets, also e-books and games consoles"

Apple is well known for the simple, no-frills product photos that highlight its lineup of mobile devices and as it turns out, a lot of work goes into capturing those images. The Verge interviewed Peter Belanger, a photographer who has worked with Apple for years, to shed some light on Apple's creative process. In the interview, Belanger reveals that Apple exercises extreme attention to detail when it comes to product photos, providing him with both sketches and a comprehensive shot list