Most of the pictures in the answers here show situations of riots, etc. which require different treatment than day to day dealings. But, in general, US police use lethal force more freely compared to other countries. I don't know the reason for this. May be it is the militarization of the police force? May be, they are trained in wrong way.
I like to blog about various topics ranging from education in IITs to social issues in India and US. All opinions and views presented here are my own and not of my employer.