What is the US missile that Ukraine has but cannot use?

Besides, the Storm Shadow, Ukraine is also keen to use US Joint Air-to-Surface Standoff (JASSM) and Army Tactical Missile System (ATACMS) missiles in an offensive capacity, a move that could significantly alter the way the country conducts its defence. Some versions of the JASSM precision missiles have a range of over 575 miles, which could, in theory, put Moscow within range Having entered service in 2009, the weapon was not employed by the US until 2018, when it was used to destroy government chemical facilities in the Syrian civil war.

Their use would bring over 30 Russian airbases into range, many of which have been used to launch strikes against Ukraine. The green light to use the ATACMS missiles would allow Ukraine to target key Russian infrastructure and logistical supply routes vital to maintain their forces on the frontline and could potentially force Putin to move logisitical depots away from Ukraine. The ATACMS has been in service for over 30 years and is used by several nations including Austraila, South Korea and Poland. Both weapons have been in Ukrainian hands since....U.S. Secretary of State Antony Blinken has said, these sophicated weapons need years of training for Ukrainian pilots, as and until training is given,Ukraine's use is thus restricted?