आज का इतिहास: अंतरिक्ष शटल कोलंबिया दुर्घटनाग्रस्त, कल्पना चावला का निधन

<p style="text-align: justify;"><strong>नई दिल्ली:</strong> एक फरवरी का दिन नासा और सारी दुनिया के अंतरिक्ष वैज्ञानिकों के दिल में एक टीस बनकर बसा है. 2003 में एक फरवरी को अमेरिका का अंतरिक्ष शटल कोलंबिया अपना अंतरिक्ष मिशन समाप्त करने के बाद धरती के वातावरण में वापस लौटने के दौरान दुर्घटनाग्रस्त

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