 Complete the following phrase:  The airline modified a Boeing 747-100 for aerial firefighting, receiving final certification from the FAA in October 2006. Compared to existing large water bombers and airtankers, the Evergreen Supertanker was planned to offer at least seven times more fire retardant capacity. In December, 2010, Israel hired Evergreens fire-fighting aircraft to assist in firefighting efforts of the 