India carries out two nuclear weapon tests at Pokhran, following the three conducted on May 11. The United States and Japan impose economic sanctions on India.

Pokhran-II was a series of five nuclear weapon tests conducted by India in May 1998. The bombs were detonated at the Indian Army's Pokhran Test Range in Rajasthan. It was the second instance of nuclear testing conducted by India, after the first test, Smiling Buddha, in May 1974.

May 11 is the 131st day of the year in the Gregorian calendar; 234 days remain until the end of the year.