A US artist is set to unveil his giant tribute to boxer Muhammad Ali made out of punch bags.Michael Kalish's work is made out of 1,300 speed bags, 6.5 miles of steel cable and 2,500lbs of aluminium pipes.It has been painstakingly arranged into a clear likeness of the legend from the front - but looks like a whirlwind of punchbags from any other angle.The installation, entitled 'reALIze', is 26ft wide, 23ft high and 25ft deep and will be unveiled in LA's Nokia Plaza on 25 March.Mr Kalish, 38, said he came up with idea after Ali's wife, Yolanda, commissioned one of the license plate sculptures for which he is best known.He based his new work on an image of Ali taken by British photographer Michael Brennan during the late 1970s.It took three to four months to design, with help from a firm of architects, and another five months to put together.The artist said that the installation was self-funded but had cost "hundreds and hundreds of thousands of dollars".Source: orange.com