Not prepared for weeks-long campaign; US talking diplomacy but preparing attack.
Vonnie Quinn
Mika Solner
Diplomatic talks ongoing but escalation increasing; officials preparing for strike as early as this week; President undecided.
Strike would lead to Iranian counter, protracted situation, scupper talks.
Vonnie Quinn
Mika Solner
Iran doesn't want US dictates on nuclear program; sides far apart; tensions very high.