The Secret Service has asked for an extra $9.5 million to cover unexpected costs of protecting the presidential candidates during what has turned into an historic year for the agency’s campaign security job.

Among other things, the extra money would be used for the added costs for the candidates’ international travel and a late-in-the-game decision by Barack Obama to accept the Democratic nomination at an open-air, 76,000-seat sports stadium in Denver.

Obama is on a six-day trip to Jordan, Israel, Germany, France and Britain, following a three-day trip to Afghanistan and Iraq. Republican candidate John McCain has traveled to Canada, Colombia and Mexico.