Deadly Russian Su-34 bombers are sitting ducks for Ukraine's ATACMS. But it can't attack without US approval.

• Near the border of northeastern Ukraine, some of Russia's lethal Su-34 fighter jets sit in the open.
• The bombers have been used to pound Ukraine with regular barrages of glide bombs.
• But Ukraine must seek US approval to strike the exposed jets.

Near the border with northeastern Ukraine, some of Russia's deadly Su-34 fighter bombers lie exposed on the tarmac of a military airfield as they await orders to carry out their next attack.