BERLIN – The chief executive of German ******* Lufthansa says unannounced tests to check pilots for prescription drugs might help improve air safety.

Carsten Spohr made the comments in an interview with the Frankfurter Allgemeine Zeitung, published Friday _ almost two months after a plane belonging to Lufthansa subsidiary Germanwings crashed in the French Alps.

Prosecutors believe co-pilot Andreas Lubitz deliberately steered the plane into a mountain, ******* all 149 people on board, after hiding psychological problems from his employer.

Lufthansa will propose the spot checks to a task force set up by Germany’s ******* industry in the wake of the *****.