Amid Combustible Atmosphere in Egypt, 'There Could Be a Showdown'

Listen to the Audio JIM LEHRER: Now some further perspective on today's events from two former presidential national security advisers. Stephen Hadley held that position for President George W. Bush. He now has his own consulting firm. Zbigniew Brzezinski served President Carter in that same national security post.

He's now counselor at the Center for Strategic and International Studies. Both of