tuberculosis is an infectious disease caused by mycobacterium tuberculosis and is the primary cause of mortality in the world. m. tuberculosis strains are important intracellular pathogens causing infection in oxygen-rich macrophages in the lungs. the emergence of aids, declined socioeconomic standards and a lessened emphasis on tb control programs have contributed to the disease resurgence. re...

An engineering lesson derived from the tragedies of the 9/11 Pentagon crash and Hurricane Katrina is the importance of resiliency in designing for multiple hazards. In the case of the Pentagon, the energy-absorbing capacity, redundancy, and continuity of the structural frame reduced the consequences of the unanticipated action. In Katrina, the hurricane protection system breached in forty-six p...

The tragedies in Aurora, Colo., Newtown, Conn., and most recently at the Navy Yard in Washington, D.C., add to the growing epidemic of mass killings in our society. Such events have brought to light the real risk—and absolute horror—of what law enforcement and Fire/EMS responders must be prepared to face. These events have spawned initiatives and opened conversations at high levels of governmen...