They clapped in Boston, and hugged some, too.
For each truck, each cop car, each ambulance to roll out from the Watertown cordons, the little pods of relieved residents celebrated their heroes.
"USA! USA! USA!"
It reminded me briefly of that night in 2011 when President Barack Obama announced Osama bin Laden's death to the world. This time the chanting groups were smaller, of course, and though in Boston their appreciation was entirely understandable, any claim to a national "victory" seemed equally as hollow as before.
Dzhokhar Tsarnaev now lies in hospital, a corridor away from those he maimed. And as Boston stretches and dawns, a nation's attention will turn from questions of how and why, to that of what to do now.