1.   At security checkpoints some passengers were being told to open boxes, bags and computers and to remove all metal including belts, watches and jewelry.

2.   Cranes remove twisted metal from the remnants of the World Trade Center.

3.   First, by passing a giant magnet over it to remove ferrous metals.

4.   Keeco says its process is similar in the way it neutralizes acidity, but more effective at removing metals.

5.   The idea of using plants to remove metals from soil is not unheard of.

6.   The toxic metals can be removed for reuse, keeping them out of landfills and water supplies.

7.   Police also used dumpsters to remove scrap metal from a large shed.