The meeting came a day after BJP announced its first list of candidates for the Lok Sabha elections.
Nitish Kumar was addressing the gathering in Bihar's Aurangabad.
PM Modi will also unveil multiple projects in the oil and gas sector, worth Rs 1.48 lakh crore.
The BJP is all set to release its first list before the Election Commission announces dates for the Lok Sabha election.
The four pilots have been training at the astronaut training facility in Bengaluru.
Veer Sawarkar passed away in 1966 on February 26.
At the event in Rajkot, PM Modi said that India is developing at a fast pace after inaugurating and dedicating all five AIIMS to the nation.
The ancient city was closely linked with Lord Krishna and was known for its grandeur and prosperity.
He further alleged that the BSP supremo Mayawati has also not spoken to him for a long time.
PM Modi urged people to keep posting the achievements of the society and the country on social media with the hashtag Mann Ki Baat.