Occurring

Civil wars are occurring in many countries.

The Department of Homeland Security's primary function is the prevention of terrorist attacks occurring within America and, in the extreme case of an attack happening, holding losses to the smallest possible level and swiftly carrying out restoration.

Also many incidents of robbery by threats and violence are occurring.

The Department of Homeland Security's primary function is the prevention of terrorist attacks occurring within the United States and, in the extreme case of an attack happening, holding losses to the smallest possible level and swiftly carrying out restoration.

Therefore individual citizens have the duty to violate domestic laws to prevent crimes against peace and humanity from occurring.

From a social perspective, menarche is typically considered the central event of female puberty - but menarche does not necessarily signal that ovulation has begun occurring.

The length of the frost-free season (and the corresponding growing season) has been increasing nationally since the 1980s, with the largest increases occurring in the western United States, affecting ecosystems and agriculture. Across the United States, the growing season is projected to continue to lengthen.

Venus does not have any naturally occurring satellites.

Earth has one naturally occurring satellite, the Moon.

Astronomers believe Saturn's rings developed from particles that resulted from the break-up of naturally occurring satellites.