United States five-dollar bill $5 bill in circulation is 5.5 years before it is replaced due to wear. Approximately 6% of all paper currency produced by the U.S. Treasury's Bureau of Engraving and Printing in 2009 were $5 bills. The redesigned $5 bill was unveiled on September 20, 2007, and was issued on March 13, 2008 during a ceremony at President Lincoln's Cottage. New and enhanced security features make it easier to check the new $5 bill and more difficult for potential counterfeiters to reproduce. The redesigned $5 bill has: The five dollar bill lacks the Optically variable ink of higher denomination US bills.
IS-5 Kaczka centre of gravity was also adjustable in flight, with a 7 kg (15 lb) weight, on a fore-aft orientated threaded rod, which could be adjusted by the pilot. The sole prototype SP-821 first flew on 29 Mar 1949 piloted by Eng. P. Mynarski. Trials continued until 1957. The IS-5 was reported to have good flying characteristics and was easy to fly. After completion of tests the aircraft was lodged with the Lodz gliding club where it was destroyed in a hangar fire in 1961. IS-5 Kaczka The IS-5 Kaczka ("Instytut Szybownictwa" – gliding institute) was a single-seat canard research glider