ATM's headphone jack, and is terminated for security when the jack is disconnected. Optionally, the customer may select to mask the account information on the ATM screen. Talking ATMs in the UK Barclays is the only major high street bank in the UK to have deployed Talking ATMs at scale. Over 80% of their 4,100 ATMs now offer the functionality. This includes the 800 ATMs at ASDA superstores which are operated by Barclays. In addition, Northern Bank in the UK have deployed 85 talking cash machines out of their estate of over 200 which amounts to 40 per cent of their estate. Most recent machines installed by banks include a standard audio jack for blind persons to interact with the machine, but these facilities have not yet been enabled. In 2011 the UK's leading charity for blind and partially sighted people, RNIB, launched a campaign to get major banks to install talking cash machines. They had also been working with LOCOG from 2009 to ensure that talking cashpoints would be provided in the Olympic Park for the London 2012 Olympics and Paralympics. However, a few weeks before the Games, sponsor and sole provider Visa announced that they would only be able to install the necessary software in time on two machines. In April 2013 RBS publicly announced as part of their 2012 Sustainability report that they would be installing Talking ATMs from 2014 onwards, as part of a wider ATM upgrade. Talking ATMs in the US The first public actions in the United States to achieve ATM access for the blind occurred in June 1999. On June 3, Mellon Bank and PNC Bank were sued in federal courts in Philadelphia and Pittsburgh respectively. On June 25, 1999, Wells Fargo became the first major bank in the United States to commit to installing talking ATMs. In a legal settlement with blind community leaders, the bank agreed to install a talking ATM at all of its 1,500 ATM locations in California. The company has subsequently installed talking ATMs at all ATM locations in all states. In July 1999, Citibank agreed to pilot five talking ATMs in and around San Francisco and Los Angeles. The Citibank machine represented a unique engineering and research challenge as it uses a touch screen interface and has no function keys to offer access to the blind. All Citibank locations with this kind of machine have been adapted