U.S. allies in Europe recall trans-Atlantic bonds after the 9/11 attacks.

* European allies reflected on the enduring trans-Atlantic bonds forged after the 9/11 attacks, despite current U.S. foreign policy shifts.
* The shared experience of combating terrorism strengthened cooperation between the U.S. and Europe for two decades.
* While the U.S. re-evaluates its global role, European nations emphasize the continued importance of the alliance for collective security.