We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
The Marine's amphibious assault ships (LHA and LHD) are the same size as the Essex class carriers of WWII, although they are configured very differently. The Marines have 10 of them, and the Navy has 11 of the larger Nimitz class carriers. I don't think the Navy ever had more than 26 Essex class carriers, so we still have a very formidable carrier force.
As shown in the early stages of the Afghan war, big empty boxes have lots of uses not intended, such as bases for special forces (eg the USS Forrestal). Our current 21 carriers may yet find roles unimagined by their designers.
Four of the Ohio class subs were converted from nuclear missile launchers to Tomahawk launchers. Each carries about 150 Tomahawk cruise missiles. (Plus some special forces on occasion.) Add to this the USS Jimmy Carter, a converted Seawolf class sub also with Tomahawks and special forces troops. This makes them carriers themselves.
The B52 remains the Air Force's favorite heavy bomber because it is way over designed big box and can haul tons and tons of just about anything a very long ways very cheaply. Much cheaper than the B1B & B2. Since big empty boxes have so many uses, the Air Force is looking into converting some 747s to a bomber role. Not every bomber needs stealth, speed and high altitude if you control the skies.
The Marines have no ships. Amphibs belong to the Navy, with Navy crews and officers. Marines operate off the gator freighters and CVNs. I believe some Marines may be attached to larger ships as security.
Used to be. I read lately that due to the changing mission of the marines, the marines have been pulled from ships to do strictly ground pounding missions... and ship security is now the purveyance of the Master At Arms force rating.