That's because pakistani musharaff holds the key to the american nuclear arsenal a total of 10,000 nuclear warheads.
That's why USA has to pay $7 billon hafta to pakistan every month.
Whole american nuclear aresanl has controls in that nuclear briefcase which has built in buttons that can launch deadliest missiles like MIRV ICBMS and destroy the world wracking havoc with hydrogen bombs the 50,000 times the power of hiroshima and THAT briefcase is in possesion of MUSHRAFF.
So you got it all explained now, noting funny about it.