In Darfur, terror from the air. Sudan intensifies use of helicopter gunships and bombs, driving more villagers from their homes.

by Glenn Kessler and Craig Timberg

EL FASHER, Sudan, Sept. 8 — Yagoub Mustafa, 45, could not easily mimic the “whoop whoop whoop, boom! boom! boom!” of two helicopter gunships that fired rockets into the huts in his Darfur village. He tried to make the noises, but they were not loud enough, or terrifying enough.