KABUL, Afghanistan (AP) — Dozens of people were buried in a Kabul cemetery on Thursday in the second mass funeral of victims killed in an airstrike that hit a drug rehabilitation center in the Afghan capital earlier this month. Bulldozers opened a large pit into which individual graves were dug for the 60 coffins. Afghan officials have said hundreds of people were killed when a Pakistani airstrike hit the 2,000-bed Omid Addiction Treatment Hospital on March 16. The U.N. humanitarian affairs