A touch system includes a touch surface and at least two cameras associated with the touch surface. The animals are advantageously used in methods for screening putative agents for altering the susceptibility, development and progression of squamous cell carcinoma and metastatic squamous cell carcinoma and have further commercial value as tools for investigating the development of metastatic disease. The light emission curved surface and a first plane are intersected to form a first curve. A receiving device receives wireless signals from the transmitter and provides the signals to a serving area interface for processing andor transmission of the signals to a Central Office for monitoring. The conventional LMR system includes a conventional site controller including a second network gateway router connected to the first network gateway router by a data network. The above steps are repeated until all objects in the source chain are moved to the target chain.