Find the right ending to this passage.

(CNN) -- A shootout in a border city that leaves five alleged drug traffickers sprawled dead on the street and seven police wounded. A police chief and his bodyguards gunned down outside his house in another border city. Four bridges into the United States shut down by protesters who want the military out of their towns and who officials say are backed by narcotraffickers. Mexican police carry a body after a clash with gangs that left 21 dead in the state of Chihuahua on February 10. That was Mexico on Tuesday. What is most remarkable is that it was not much different from Monday or Sunday or any day in the past few years.

"It's as if the burden of being the main arena of the anti-drug war has overwhelmed
Mexican institutions," Birns said.