Ian Mader

The search for the missing Malaysian jet pushed deep into the northern and southern hemispheres Monday as Australia scoured the southern Indian Ocean and Kazakhstan — more than 10,000 kilometers (6,000 miles) to the northwest — answered Malaysia’s call for help in the unprecedented hunt.

Investigators are trying to restore files deleted last month from the home flight simulator of the pilot aboard the missing Malaysian plane to see if they shed any light on the disappearance, Malaysia’s defense minister said Wednesday.