After further destruction to the Philippines during the 1973 typhoon season, the Typhoon Moderation Program began exploring the Cloud Seeding Program as a means of minimizing the dangers of typhoons. As detailed by PAGASA director Roman Kintanar, they sought to weaken typhoons by 'seeding' it with various elements, most notably silver iodide, to increase the width of the eye, therefore increasing the diameter of the typhoon in order to increase the cover of the landfall but consequently reduce the intensity of rainfall. Such undertakings have been seen previously when the US launched the infamous Operation Popeye, which attempted to extend the monsoon season in Vietnam in 1967, and Project Stormfury, which, similar to the Typhoon Moderation Program, sought to weaken typhoons in the early 1960s. Kintanar detailed Weather Modification Experiments (WEMEX), such as WEMEX I, which was initiated over Central Visayas in 1975, and WEMEX II, which was initiated over Central Luzon the following year. Results were inconclusive, but as with both Popeye and Stormfury, the data gathered ultimately proved helpful for meteorologists in future tracking of weather patterns and typhoon forecast.