NEWS 1:One-time H-1B visa fee is only for new applicants says U.S.

GS-2 international relation

• The $100,000 fee is a one-time payment, not an annual levy.
• Applicable only to new H-1B applicants; current visa holders exempt.
• Aim is to implement from the next lottery cycle.
• Earlier confusion was caused by statements from U.S. Commerce Secretary suggesting annual applicability.
• Announcement eased fears of a surge in last-minute flight bookings by H-1B visa holders.
• Opposition in India criticized the hike, calling it “strong-arm tactics” by the U.S.

H-1B visa

The H-1B visa is a non-immigrant visa that allows U.S. companies to employ foreign workers in specialty occupations that require theoretical or technical expertise. It is one of the most sought-after work visas for professionals, particularly in fields like IT, engineering, finance, healthcare, and research.

Key Features of the H-1B Visa

• Specialty Occupation: The job must require at least a bachelor’s degree (or equivalent) in a specific field.
• Employer-Sponsored: An individual cannot apply directly; a U.S. employer must file a petition on their behalf.
• Duration: Initially granted for 3 years, extendable to a maximum of 6 years (with exceptions for green card applicants).
• Cap Limit:
  • Regular Cap: 65,000 visas per year.
  • Master’s Cap: An additional 20,000 visas reserved for applicants with a U.S. master’s degree or higher.
• Lottery System: Due to high demand, USCIS usually conducts a random lottery to select petitions.
• Dual Intent: Unlike some other visas, H-1B allows “dual intent” — meaning you can apply for a green card while on H-1B status.

NEWS 2:IAF’s iconic MiG-21 fighter to fly into sunset after six decades of service

GS-3 internal security

IAF retires MiG-21 fighter jets after 60 years of service; ceremonial flypast marks end of an era.

• The Indian Air Force (IAF) will retire its MiG-21 fighter jets on September 26, after nearly six decades of service.
• The MiG-21, inducted in 1963, was India’s first supersonic fighter jet.
• Over 700 MiG-21s of different variants were inducted, many built by Hindustan Aeronautics Limited (HAL).
• The aircraft played roles in the 1965 and 1971 wars, the 1999 Kargil conflict, the 2019 Balakot air strikes, and Operation Sindoor.

The MiG-21 is a supersonic jet fighter aircraft developed by the Soviet Union’s Mikoyan-Gurevich Design Bureau in the late 1950s. It is one of the most widely produced and longest-serving fighter aircraft in history, often nicknamed the “Flying Coffin” in India due to its high accident rate in later years

Key Features

• Role: Initially an interceptor, later adapted for multirole operations.
• Design:
  • Delta wing (improves high-speed performance, but less effective in low-speed handling).
  • Lightweight and fast, but limited range and payload.
• Performance:
  • Top speed: Around Mach 2 (over 2,100 km/h).
  • Range: ~1,200 km (without external tanks).
  • Armament: One internal cannon, provision for air-to-air missiles, bombs, and rockets.

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Service History

• First Flight: 1955; entered Soviet service in 1959.
• Global Use: Operated by over 60 countries across Asia, Africa, and Eastern Europe.
• Production: More than 11,000 units built, making it the most-produced supersonic jet in history.
• Combat Record:
  • Used extensively in the Vietnam War, Arab-Israeli conflicts, Indo-Pak wars, and numerous Cold War-era conflicts.
  • In India, played a major role in the 1965 and 1971 wars against Pakistan.

NEWS 3:Astronomers have spotted the biggest bangs since the Big Bang

GS-3 science and technology

Astronomers discover Extreme Nuclear Transients (ENTs), the universe’s biggest explosions since the Big Bang, caused by black holes consuming massive stars.

• ENTs are caused by supermassive black holes tearing apart massive stars, at least three times heavier than our sun, in galactic centers.
• ENTs emit up to ten times more energy than gamma-ray bursts (GRBs), the previous record holders for the most energetic events.
• The discovery was made by astronomers from the University of Hawaii’s Institute for Astronomy (IfA) while analyzing data from the European Space Agency’s Gaia spacecraft.

Extreme Nuclear Transients (ENTs) refer to sudden, intense bursts of nuclear energy that occur in astrophysical systems, typically observed as very bright, short-lived phenomena. These are part of high-energy astrophysics and are still an emerging area of research.

• Definition: ENTs are rare, rapid, and extremely luminous outbursts powered by nuclear reactions, often associated with compact astrophysical objects like neutron stars or white dwarfs.
• Nature: Unlike supernovae (which are longer-duration explosions), ENTs are short-lived (milliseconds to minutes) but release enormous energy.

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Possible Sources of ENTs

1. X-ray Bursts
   • From accreting neutron stars in binary systems.
   • Caused by runaway thermonuclear burning on the neutron star’s surface.
2. Magnetar Flares
   • Extremely powerful bursts from highly magnetized neutron stars.
   • Energy release is both nuclear and magnetic.
3. Thermonuclear Runaways in White Dwarfs
   • Short outbursts similar to novae, but far more extreme.
4. Exotic Nuclear Events
   • Hypothetical nuclear phase transitions in dense stellar cores.

MAINS MOCK QUESTION

“The Indian Air Force (IAF) has played a pivotal role in strengthening India’s defence preparedness, but it continues to face challenges in modernization, indigenization, and operational readiness.” Critically examine.