U2's soaring anthem Beautiful Day anchors a mission video shown aboard Orbis International's DC-10 Flying Eye Hospital. At the heart of the huge plane, parked through Saturday at the Palm Beach International Airport, is a surgical suite where thousands of poor people from across the globe have had their vision restored. Ophthalmologist Dr. Cliff Salinger, a cornea specialist, has helped bring the beauty of sight to many in the past 10 years. His volunteer work on the Orbis jet has taken him for a few weeks at a time to four regions of China, as well as Paraguay and Cuba. In mid-1988, just after completing his residency at the University of Medicine and Dentistry of New Jersey, Salinger started a yearlong stint aboard the Flying Eye Hos

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