American Science and Engineering Inc.'s MobileSearch High-Energy (HE) cargo and vehicle inspection system features both high-energy transmission and proprietary Z Backscatter X-ray imaging for detecting threats and contraband including weapons, explosives, drugs and currency. The system offers multiple scan modes for high speed scanning of passenger vehicles or oversized or odd-shaped cargo in either "drive-by" mode to scan stationary objects, or "portal" mode to scan vehicles as they drive past. The system is ideal for homeland security and drug interception missions at seaports, border crossings and other checkpoints.