Suicide Bombers Strike in Afghanistan During Hagel's Visit

At least 18 killed

KABUL, Afghanistan (AP) -- Militants staged two suicide attacks that killed at least 18 people on Saturday, the first full day of U.S. Defense Secretary Chuck Hagel's visit to Afghanistan. They were a fresh reminder of the challenges posed by insurgents to the U.S.-led NATO force as it hands over the country's security to the Afghans.