Bloomberg: United Nations Secretary-General Ban Ki-moon said he will chair a new UN task force to counter the effects of soaring food prices that are putting basic foods beyond the reach of the poorest people. The food crisis is an “unprecedented challenge” that has “multiple effects on the most vulnerable,” Ban told a press conference in the Swiss capital Bern today. “We must feed the hungry,” and “full funding” is needed, he said, referring to the $755 million appealed for in February …