Newly confirmed Defense Secretary Chuck Hagel's first trip to Afghanistan turned into a fiasco. Just hours after his arrival in Kabul on Saturday, a suicide bomber blew himself up outside the Afghan Ministry of Defense. At least 10 people were killed. Another suicide bomber followed suit near a joint Afghan-American checkpoint in the eastern province of Khost, killing nine, including eight children and a policeman. On Sunday, Afghan President Hamid Karzai accused the United States of collaborating with the Taliban. Hagel, who left the country without accomplishing anything, had two words for reporters who inquired about the challenges he faced. "It's complicated," he contended.