Airports , Cargo, Passengers , Aircraft.

Seaports, Containers, Crew, Passengers, Entire Ship.
(Container scanning assumes added significance in the context of USA entering into agreements with various countries to pre-scan the containers at the port of origin itself.)

Railway Stations, Trains, Stadiums, Parade Grounds, Auditoriums, Exhibition Halls, Public Gatherings.

Palaces , Ministries Embassies, VIP Residences, Industrial Establishments, Commercial Establishments, Banks, Trade Centres, Shopping Malls, Hotels, Hospitals.

Anti Terrorism Squads, Police, Military, Para Military, Special Protection Forces, Rapid Action Forces.

Suspicious Buildings(Without even entering), Vehicles, Parking Lots

Mine Fields, Metal Scrap Consignments, (Imported consignments often contain unexploded shells)