WASHINGTON (Reuters) -President Joe Biden took steps on Wednesday to address the shortage of infant formula in the United States, invoking the Defense Production Act to help manufacturers obtain the ingredients needed to ramp up supply, the White House said. Biden also directed U.S. agencies to use Defense Department commercial aircraft to bring formula into the United States from overseas. Baby formula aisles at U.S. supermarkets have been decimated since top U.S. manufacturer Abbott Laboratories in February recalled formulas after complaints of bacterial infections. On Monday, Abbott said it…