With American troops already stretched thin, the future use of military force must anyway be constrained.

ECONOMIST: Foreign policy

On the broader question, the legal authorities that exist to use lethal force are bound by and constrained by the law and the Constitution.

WHITEHOUSE: Press Briefing

Jude Medical (nyse: STJ - news - people ), a smaller maker of defibrillators and pacemakers that he feels has been constrained by a too-tiny sales force.

FORBES: JNJ-Guidant Vs. Boston-Scientific-St. Jude