Over time that message evolved so the muscle activity involved in a smile sends a message to the brain signaling safety, which could translate into lower heart rate and stress levels.

WSJ: Stress-Busting Smiles

But Putin's message is plain: he is signaling that as Russia gains global prominence it is no longer content to accept Western dominance, including over who heads the IMF and the World Bank.

FORBES: Magazine Article

But with Republicans looking for a new message and messenger, Jeb Bush is signaling he's open to the possibility.

NPR: Jeb Bush: Political Reporters Are 'Crack Addicts'

Instead, Gov. Romney is signaling an indifference to these topics - and, in the process, sending a message that can only alienate those for whom such issues are not just important but determinative of their votes.

CENTERFORSECURITYPOLICY: The G.O.P.'s One-Legged Stool?