Heavily-armed henchmen of Osama bin Laden are seen in a desert area, dressed from head to toe in black, using the flag as target practice.  The video also shows the Stars and Stripes and Israel’s flag riddled with bullets as the men unload their rifles. Two men released from America's Guantanamo Bay terror prison appear in the video, which has also been posted on jihadist websites. Abu Har More..eth Muhammad al Oufi is seen venting his fury at the West while holding an automatic rifle and brandishing a grenade. Former inmate Abu Sufyan al Azdi al Shahri is filmed sitting with two other men before a flag of the Islamic State of Iraq, the symbol for the al Qaeda terror network in Iraq. "By Allah, imprisonment only increased our persistence in our principles for which we went out, did jihad for, and were imprisoned for," he is quoted as saying. Both fanatics have now been promoted to the senior ranks of al Qaeda, US counter-terrorism experts said. The US Defence Department believes around 60 former Guantanamo inmates - more than 10% of the 520 so far released - have returned to the fight against the West. Security analysts believe this latest video message means Britain is a revenge target for the three-week Israeli offensive in Gaza. They said it clearly shows the UK ranks alongside America and Israel as top of al Qaeda's hate list. US President Barack Obama has signed an executive order to close Guantanamo Bay, which holds about 245 prisoners at a US naval base in Cuba. Human rights groups have long argued that the indefinite detention of terror suspects without charge is unjustifiable.