According to reports, that is precicely what they are doing.
They also have quick response marines on standby 24/7 and positioned at intervals.
And, no response of of stand-by marines can save from a machine-guns fired from a second floor. Those thugs would not dare if they saw sufficent protection. Forces on stanby are good for the extrication of those already ander attack in an open field --- even in the jungle, where you might hover a helicopter, perhaps under fire from below. You cannot extricate someone from gragged into an unseen apartment in a myriad of tiny, narrow streets. Especially if you are given orders not to have a single civilian casualy. Prevention rather than correction of a problem is therefore a solution. We did not follow it.