Most online harassment consists of name-calling or trying to embarrass someone, but there is also the darker side of physical threats: stalking, sexual harassment and being harassed for a long period of time.
About half of Iraq and Afghanistan war veterans (47%) said that they served with a comrade that had been killed. That number rises to 62% among soldiers who were in combat.
Race and community relations have become the focal point of tension in a series of incidents over the past year.
As President Obama delivers the State of the Union address Jan. 20, here's a primer of U.S. public opinion on top issues, the state of the nation and the country's political leaders.
President Obama and the GOP-controlled Congress have sharp differences on environmental and energy issues. Here's a look at where public opinion stands.
The attack on the offices of the satirical French magazine Charlie Hebdo claiming 12 lives was the most closely followed news in the U.S. last week, but interest in the story was not as high when compared with four previous terrorist incidents abroad.
The new GOP-controlled Congress takes office at a time when the American public sees partisan rifts in the country getting worse.
In August 2011, 53% of Americans said the use of torture to question suspected terrorists could be often or sometimes justified, while 42% said it could only rarely be justified or not justified at all.
One of the most persistent gaps between blacks and whites involves their levels of confidence in police.
While President Obama's stock with the public has taken a beating, the environment is one area where he maintains an advantage over the GOP.