Foreign diplomacy doesn’t always resolve world-class problems, but it sure does rake in the swag. Former Secretary of State Hillary Clinton was given a half-million bucks worth of diamond and ruby jewelry by Saudi Arabian King Abdullah bin Abdul Aziz and received $58,000 worth of bling from Brunei. The lavish gifts were among a treasure trove of keepsakes bestowed upon U.S. leaders in 2012, the State Department disclosed Thursday. ... Meanwhile, Vice President Joe Biden got a bare-breasted female bust from Liberia. The Constitution prohibits U.S. government employees from keeping presents worth more than $350. But officials at the U.S....