Key members of the Security Council obviously are not serious about containing the fascist monster, Kim Jong-Un.

They won't even freeze his assets.

Kim is in the same league as Tojo, Pol Pot, and Hitler.  Indeed, in some ways he is worse.  Kim had no compunctions at all about murdering his step-brother with VX nerve agents and his uncle with an AA gun in a public stadium.  Kim had extended members (distant cousins) of his uncle murdered as well, again in public settings (schoolyard grounds) with flame throwers.

Nikki Haley is now channeling Samantha Powers when she talks about "strongest measures."

Nikki apparently does not realize that sanctions have been utterly useless in preventing the lunatic criminal Kim from obtaining the means to produce hydrogen bombs and ICBMs;  apparently, she did not read the UN report published last week which documented that UN sanctions were an unenforced joke.

Is the US "willing to act alone" to stop Kim's WMD program?

As Trump said: "We'll see."