The happy crowd was jitterbugging to a boogie woogie beat.

There was a heavy presence of police around the Mall but, unless there were security measures I could not see, the festivities still seemed like an easy target. There were no barriers to a truck bomb driven by some suicidal jihadi speeding into the crowd and detonating himself.

But nothing of the sort happenned. Were we just lucky or were our defenses good enough to preempt attacks? I hope it's the latter.