Washington - Hillary Clinton's presidential campaign said on Tuesday it was "pleased" over the FBI's decision not to recommend criminal charges over her handling of emails as secretary of state."We are pleased that the career officials handling this case have determined that no further action by the [Justice] Department is appropriate," her campaign spokesperson Brian Fallon said in a statement, a short time after FBI Director James Comey held a press conference announcing its findings."As the secretary has long said, it was a mistake to use her personal email and she would not do it again. We are glad that this matter is now resolved," Fallon said.The AP meanwhile reported that less than two hours after the legal cloud was lifted from her campaign, Clinton had boarded Air Force One for a flight with President Barack Obama to a joint campaign appearance in North Carolina. Clinton's rival Donald Trump objected to the travel arrangement. He tweeted, "Why is President Obama allowed to use Air Force One on the campaign trail with Crooked Hillary? Who pays?"Presidents make all their plane flights on Air Force One, no matter the purpose of the trip. Political committees are required to contribute to the cost of a president's campaign-related travel, though a portion of such costs is borne by taxpayers, too.