SHENANDOAH, Iowa, Nov. 20 — Fog may have diverted Senator Hillary Rodham Clinton’s plane from her campaign stop here on Tuesday, but that did not prevent her from continuing her attacks on Senator Barack Obama’s experience.

It was an odd moment. Mrs. Clinton, her voice piped in over a sound system, apologized for missing the event, expressed concern about the safety of food and toys from overseas and, pivoting off the overseas topic, tweaked Mr. Obama for saying on Monday that living overseas as a child had increased his experience in foreign relations.

Mrs. Clinton, who this week in Iowa has been making an issue of Mr. Obama’s experience, said the next president would face two wars and fraying alliances. She said she had traveled broadly and had “met with countless world leaders” and knew many of them personally.

“Now voters will judge whether living in a foreign country at the age of 10 prepares one to face the big, complex international challenges that the next president will face,” Mrs. Clinton said. “I think we need a president with more experience than that.”