The State Department has approved South Korea’s request to purchase up to 36 AH-64E Apache helicopters from the U.S. government. The Defense Security Cooperation Agency said Monday the proposed foreign military sale is valued at around $3.5 billion and includes 76 T700-GE-701D engines, 36 AN/ASQ-170 modernized target acquisition and designation sight, 28 AN/APG-78 fire control