General James L. Jones it was not the lack of combat troops and the caveats were the problem, but the lack of adequate helicopters and military intelligence to support airlift and on-the-ground operations. While the NATO countries in question refused to participate in the fighting in the south, they agreed to remove some of these national caveats, and in an emergency situation, all national caveats should cease to exist, meaning that every ally should come to the aid of the forces that require assistance. A number of NATO member states also pledged to provide additional assets, including fighters, helicopters, infantry companies as well as training teams that will mentor the Afghan National Army. NATO Secretary General Jaap de Hoop Scheffer said that the removal of some of the caveats meant that some 20,000 of the 32,000 NATO troops in ISAF are made "more usable" for combat duties and that 90% of the formal mission requirements were now filled. Military sources, however, told reporters at the summit that these caveats never existed in emergency situations, adding that it would be a strange alliance where one country's soldiers refused to support their allies in an emergency. NATO leaders also backed a French proposal to set up a "contact group" to coordinate action concerning Afghanistan, but the United States had reservations about France's proposal to include Iran, which has considerable influence over the west of Afghanistan, in the proposed contact group due to the dispute over Iran's nuclear programme. The group was modelled on the one set up for the Yugoslav Wars in the 1990s. Political scientist Joseph Nye commented that "while the Riga summit relaxed some of these caveats to allow assistance to allies in dire circumstances, Britain, Canada, the Netherlands, and the US are doing most of the fighting in southern Afghanistan, while French, German, and Italian troops are deployed in the quieter north. It is difficult to see how NATO can succeed in stabilizing Afghanistan unless it is willing to commit more troops and give commanders more flexibility." The controversy surrounding the differences in contributions to Afghanistan indeed remained after the summit. For instance, in March 2007, British commanders accused the NATO members that refused to fight in the conflict-ridden south (in non-emergency situations) of causing "huge resentment" and a sense of betrayal and undermined the credibility of the alliance. They added that despite the earlier pleas for reinforcements or