Other than grudging diplomatic and perhaps financial support, Arab and 'Muslim' support is primarily symbolic, not military. Relative to what could be provided, the Arab military hardware on show is vanishingly slight.
Despite NATO's new Alliance Maritime Strategy, the protracted discussion around how best to respond to events in Libya means that Alliance solidarity and the need for reforms are increasingly important issues.
Arab support for military action against Libya was initially strong, arguably stemming from a desire to change the focus of international and domestic attention. But as civilian casualties increase, the political calculus is changing - and Arab support is wavering.
The US President visits the Gulf amidst heightened tension between the United States and Iran. But the latest episode in the Straits of Hormuz only underlines the wariness towards both countries by Gulf Arab States.
An analysis of the means the US should employ in its policy towards Iran's nuclear ambitions. A combination of sticks, carrots and diplomacy might serve Washington's aims better than sanctions and rhetorical brinksmanship.