Women and nuclear-capable ballistic missiles usually don't go together. But, breaking the glass ceiling in a typical male bastion, a woman scientist will now head a key missile project of the country. Tessy Thomas, 45, will now be the project director for the new advanced version of the 2,500-km range Agni-II missile. The promotion comes soon after she played a crucial role in the successful firing of the 3,500-km range Agni-III missile last week as associate project director.