And get back into serious cruise missile design. We came up with a lot of nifty smaller ones during the GWoT but we need something a lot newer than ATACMS. Wasn't there some 1980's missile we had that was ever bigger and nastier than ATACMS we ended up canning?
ATACMS isn't a cruise missile. I know it sounds pedantic but this is actually important. ATACMS is a ballistic missile. Ballistic missiles have an initial boost phase, basically a rocket engine, and then fly in a parabolic, or "ballistic" arc to its target. Cruise missiles are low flying, terrain following missiles that have an onboard jet engine that power it all the way to its target. As for ATACMS, it's old and outdated, we don't even make it anymore. The hip new TBM is the PrSM (pronounced "prism"). PrSM is longer range, more precise, and cheaper to produce. It has a smaller warhead but when your CEP goes from a few meters from the target to a few feet from the target, you don't need as big of a warhead.
As for true cruise missiles, the US has three (kinda) main ones in service. The first is the AGM-129. This is the big boy, exclusively used by the B-52 and serves as a stealthy, long range, nuclear capable strategic strike implement. This is why I say kinda, because it is rarely used in the conventional role. Second is the JASSM. The JASSM is the bleeding edge cruise missile used by the Air Force. It's stealthy with a remarkably low RCS and can be launched from standoff distance, meaning that the range of the JASSM is longer than the range of any known potential enemy air defense systems. Lastly is the veritable Tomahawk. While Tomahawk is a little long in the tooth, it's mostly fine. They get consistent upgrades and, more importantly, they are fucking everywhere. The US has a truly comical number of these things. The 4 Ohios refit as guided missile subs carry over a hundred, and flight IIA and newer Arleigh Burkes have 96 VLS cells for them. They're the workhorse of the US Navy, and have been additionally modified to be launched from ground based launchers. Is it the best, most bleeding edge tech? No, but it's firmly in the "good enough" category for the next twenty years.
The biggest issue the US had for the longest time was that the standard AShM was the Harpoon, which straight up sucked ass. Luckily it's been replaced/is being replaced by the LRASM, which is a stealthy, sea skimming anti-ship cruise missile derived from the JASSM program. It can be fired from any member of the F-35 family. Technically the LRASM could be considered a cruise missile, but afaik it is used only for anti-ship operations, so I keep it in the AShM category.
Edit: I forgot to add that the AGM-129 is technically "retired," however they weren't destroyed, they were mothballed to comply with the SORT arms reduction treaty. They are still functional and just being kept in a warehouse somewhere.