By the CNN Wire Staff
U.S. Secretary of State Hillary Clinton flew to Afghanistan early Saturday as part of a 13-day trip that will tackle some of the thorniest U.S. foreign policy issues.
Clinton was in Kabul on a previously unannounced visit and will meet with Afghan President Hamid Karzai.
During the trip, the top U.S. diplomat also will meet Israeli and Palestinian leaders, visit Egypt, where tensions are rife between military and civilian leaders, and attend a conference of leading Asia-Pacific nations, the region of increasing strategic focus for the United States.
In Paris, the first stop of the trip, Clinton attended a meeting Friday of the Friends of Syria, a group of more than 60 countries that aims to find a solution to the Syrian crisis.