Four Philippine Air Force pilots were killed back on a flight base. Fernando Air Base, Lipa City, Batangas, Friday 3:51 p.m. Seven SF-260 trainers flew in close, low formation. Two collided. Both fell within the perimeter of the base. The other five landed. No one was hurt on the ground. Since then: > Every SF-260 in the fleet is grounded.

Four Philippine Air Force pilots were killed back on a flight base. Fernando Air Base, Lipa City, Batangas, Friday 3:51 p.m. Seven SF-260 trainers flew in close, low formation. Two collided. Both fell within the perimeter of the base. The other five landed. No one was hurt on the ground. Since then: > Every SF-260 in the fleet is grounded.

> Defense Secretary Teodoro says the review covers flight planning, maintenance, pilot training and command leadership.

> It's not the first: In May, two military pilots died when an SF-260 crashed in Benguet. The SF-260 is a small propeller trainer, a market design first flown in the 1960s. And this is the Air Force in Washington continues to present as a front line against China in the South China Sea. Condolences to the four families. They deserve straight answers, before anyone talks about the next exercise with US forces.