citigroup, deutche bank, barclays and the investment banking unit of bank of america left it up to individual departments to pay out of their own accounts. back in the day, as in before the financial crisis, wall street firms rented out nightclubs and steakhouses in midtown for holiday celebrations. the u.s. government is calling in the national academy of sciences for yet another safety review of airport scanners. the department of homeland security says the nonprofit group of scientists will be charged with reviewing previous studies done on the scanners. the call comes amid continuing concerns from some members of congress, as well as some scientists, about the amount of radiation that the scanners subject travelers to. brave investors who bought junk-rated greek bonds in january of 2012 are sitting on profits. the highly-risky bond buy during an extremely volatile time for the country has earned investors 20 times more than people who purchased top-rated german debt this year. bloomberg news reports the return on the greek junk bonds is up 80%, compared to a gain of just 3.7% for german b