Aware that with or without bombs, the bases made Britain what Winston Churchill called a "bull's-eye" for Soviet attack, he and other British leaders made repeated unsuccessful attempts to learn details of American war plans, and not until 1951 did the United States formally, if vaguely, agree to consult with Britain before using atomic weapons based there. As Tedder complained during the Berlin crisis, when war at any moment seemed possible, the defense of the West relied "on the use of a weapon about which we in fact know very little". British plans such as SPEEDWAY, which discussed American-British-Canadian joint planning for the early part of a war over the next 18 months, likely incorporated some information informally sent by the United States, including projections on future bomb production and targets. The Chiefs of Staff Committee was dissatisfied, however, writing that "We are at a disadvantage in that ... we do not know the details of the number of atomic weapons to be used and so cannot assess with any accuracy the results that can be achieved."