Leopard 2E
... that the Spanish Leopard 2E is the most expensive Leopard 2 tank built to date?
... that the <a href="./Spanish_Armed_Forces" id="mwB2I" rel="mw:WikiLink" title="Spanish Armed Forces">Spanish</a> <b id="mwB2M"><a href="./Leopard_2E" id="mwB2Q" rel="mw:WikiLink" title="Leopard 2E">Leopard 2E</a></b> is the most expensive <a href="./Leopard_2" id="mwB2U" rel="mw:WikiLink" title="Leopard 2">Leopard 2</a> <a href="./Tank" id="mwB2Y" rel="mw:WikiLink" title="Tank">tank</a> built to date?